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7,847,459
del word_index, embeddings_index, all_embs, embedding_matrix, model, inp, x time.sleep(10 )<statistical_test>
predictors = data[data.Age > 0] predictors.drop(['Age'], axis=1, inplace=True) targets = np.array(data[data.Age > 0].Age) predictors.shape, targets.shape
Titanic - Machine Learning from Disaster
7,847,459
EMBEDDING_FILE = '.. /input/embeddings/paragram_300_sl999/paragram_300_sl999.txt' def get_coefs(word,*arr): return word, np.asarray(arr, dtype='float32') embeddings_index = dict(get_coefs(*o.split(" ")) for o in open(EMBEDDING_FILE, encoding="utf8", errors='ignore')if len(o)>100) all_embs = np.stack(embeddings_index....
predictors = StandardScaler().fit_transform(predictors )
Titanic - Machine Learning from Disaster
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model.fit(train_X, train_y, batch_size=512, epochs=3, validation_data=(val_X, val_y))<predict_on_test>
mlp = MLPRegressor(hidden_layer_sizes=(150, 100)) mlp.fit(predictors, targets) y_pred = mlp.predict(predictors) mean_squared_error(y_pred, targets), mlp
Titanic - Machine Learning from Disaster
7,847,459
pred_paragram_val_y = model.predict([val_X], batch_size=1024, verbose=1) for thresh in np.arange(0.1, 0.501, 0.01): thresh = np.round(thresh, 2) print("F1 score at threshold {0} is {1}".format(thresh, metrics.f1_score(val_y,(pred_paragram_val_y>thresh ).astype(int))))<predict_on_test>
train.loc[train.Age < 0, 'Age'] = mlp.predict(StandardScaler().fit_transform(train[train['Age'] < 0][['Alone', 'Cabin', 'Fare', 'Pclass', 'Sex','Ticket', 'Title']]))
Titanic - Machine Learning from Disaster
7,847,459
pred_paragram_test_y = model.predict([test_X], batch_size=1024, verbose=1 )<set_options>
test.loc[test.Age < 0, 'Age'] = mlp.predict(StandardScaler().fit_transform(test[test['Age'] < 0][['Alone', 'Cabin', 'Fare', 'Pclass', 'Sex','Ticket', 'Title']]))
Titanic - Machine Learning from Disaster
7,847,459
del word_index, embeddings_index, all_embs, embedding_matrix, model, inp, x time.sleep(10 )<find_best_params>
test.loc[test.Age < 0, 'Age'] = 0.1 train.loc[train.Age < 0, 'Age'] = 0.1 train.head()
Titanic - Machine Learning from Disaster
7,847,459
pred_val_y =(4 * pred_glove_val_y + pred_fasttext_val_y + 3 * pred_paragram_val_y + 2 * pred_cnn_val_y)/ 10.0 thresholds = [] for thresh in np.arange(0.1, 0.501, 0.01): thresh = np.round(thresh, 2) res = metrics.f1_score(val_y,(pred_val_y > thresh ).astype(int)) thresholds.append([thresh, res]) print("F1 score at thr...
predictors = train.drop(['PassengerId', 'Survived'], axis=1) targets = train[['Survived']] predictors = StandardScaler().fit_transform(predictors )
Titanic - Machine Learning from Disaster
7,847,459
pred_test_y =(4 * pred_glove_test_y + pred_fasttext_test_y + 3 * pred_paragram_test_y + 2 * pred_cnn_test_y)/ 10.0 pred_test_y =(pred_test_y > best_thresh ).astype(int) out_df = pd.DataFrame({"qid":test_df["qid"].values}) out_df['prediction'] = pred_test_y out_df.to_csv("submission.csv", index=False )<import_modules>
x_train, x_test, y_train, y_test = train_test_split(predictors, targets, test_size = 0.05, random_state = 0 )
Titanic - Machine Learning from Disaster
7,847,459
import os import time import numpy as np import pandas as pd from tqdm import tqdm import math from sklearn.model_selection import train_test_split from sklearn import metrics from keras.preprocessing.text import Tokenizer from keras.preprocessing.sequence import pad_sequences from keras.layers import Add, Concatenate,...
mlp = MLPRegressor(batch_size=50, hidden_layer_sizes=(140)) mlp.fit(x_train, y_train) y_pred = mlp.predict(x_train ).round() test_pred = mlp.predict(x_test ).round() score = accuracy_score(y_train, y_pred) test_score = accuracy_score(y_test, test_pred) mlp, score, test_score
Titanic - Machine Learning from Disaster
7,847,459
<split><EOS>
ids = test['PassengerId'] predictions = np.abs(mlp.predict(StandardScaler().fit_transform(test.drop(['PassengerId'], axis=1)) ).round() ).astype(int) output = pd.DataFrame({ 'PassengerId' : ids, 'Survived': predictions }) output.to_csv('submission.csv', index=False )
Titanic - Machine Learning from Disaster
6,589,006
<SOS> metric: categorizationaccuracy Kaggle data source: titanic-machine-learning-from-disaster<statistical_test>
from sklearn.linear_model import LogisticRegression from sklearn.model_selection import train_test_split, GridSearchCV, RandomizedSearchCV from sklearn.metrics import accuracy_score, confusion_matrix, roc_auc_score, roc_curve from sklearn.preprocessing import StandardScaler, OneHotEncoder, KBinsDiscretizer from sklearn...
Titanic - Machine Learning from Disaster
6,589,006
def getGloVeEmbeddings() : EMBEDDING_FILE = '.. /input/embeddings/glove.840B.300d/glove.840B.300d.txt' def get_coefs(word,*arr): return word, np.asarray(arr, dtype='float32') embeddings_index = dict(get_coefs(*o.split(" ")) for o in open(EMBEDDING_FILE)) all_embs = np.stack(embeddings_index.values()) emb_mean,emb_std...
warnings.filterwarnings("ignore" )
Titanic - Machine Learning from Disaster
6,589,006
glove_embedding = getGloVeEmbeddings() fasttext_embedding = getFastTextEmbeddings() paragram_embedding = getParagramEmbeddings()<set_options>
%matplotlib inline
Titanic - Machine Learning from Disaster
6,589,006
class KMaxPooling(Layer): def __init__(self, k=1, axis=1, **kwargs): super(KMaxPooling, self ).__init__(**kwargs) self.input_spec = InputSpec(ndim=3) self.k = k assert axis in [1,2], 'expected dimensions(samples, filters, convolved_values),\ cannot fold along samples dimension or axis not in list [1,2]' self.axis =...
data = pd.read_csv('/kaggle/input/titanic/train.csv')
Titanic - Machine Learning from Disaster
6,589,006
mvcnn = MV_CNN() mvcnn.fit(train_X, train_y, batch_size=1024, epochs=2, validation_data=(val_X, val_y))<find_best_params>
def test_thresh(lower = 0.1, upper = 0.95, jump = 0.01): accs = {} for i in np.arange(lower, upper, jump): accs[i] = accuracy_score(test[1], predict(test[0], model, transformers, thresh = i, prep = False)['Survived']) best_thresh = np.round(sorted(accs.items() , key = lambda x: x[1], reverse = True)[0][0], 2) train_a...
Titanic - Machine Learning from Disaster
6,589,006
pred_y = mvcnn.predict([val_X], batch_size=1024, verbose=1) max_f1 = 0 max_thresh = 0 for thresh in np.arange(0.1, 0.501, 0.01): thresh = np.round(thresh, 2) score = metrics.f1_score(val_y,(pred_y > thresh ).astype(int)) print("F1 score at threshold {0} is {1}".format(thresh, score)) if score > max_f1: max_f1 = score...
def process_data(data, transformers = None): data = data.copy() data.set_index('PassengerId', inplace = True) data['title'] = data.Name.str.split(',' ).str[1].str.strip().str.split().str[0] low_freq_titles = data.title.value_counts() [lambda x: x < 10].index data['title'] = data['title'].apply(lambda x: 'Misc' if x in...
Titanic - Machine Learning from Disaster
6,589,006
pred_y = mvcnn.predict([test_X], batch_size=1024, verbose=1) pred_test_y =(pred_y > max_thresh ).astype(int) out_df = pd.DataFrame({"qid": test_df["qid"].values}) out_df['prediction'] = pred_test_y out_df.to_csv("submission.csv", index=False )<load_from_csv>
def fit_model(train_data, scale = True): preped, bins, dummy = process_data(train_data) scaler = StandardScaler() X = preped.drop('Survived', axis = 1) if scale: X = pd.DataFrame(scaler.fit_transform(X), columns = X.columns, index = X.index) else: scaler = None y = preped['Survived'] X_train, X_test, y_train, y_test...
Titanic - Machine Learning from Disaster
6,589,006
train_df = pd.read_csv(".. /input/train.csv") test_df = pd.read_csv(".. /input/test.csv") print("Train shape : ",train_df.shape) print("Test shape : ",test_df.shape )<split>
def predict(test_df, model, transformers, thresh = 0.5, prep = True): if prep: temp_df = process_data(test_df, transformers) idx = temp_df.index if transformers[2] is not None: temp_df = pd.DataFrame(transformers[2].transform(temp_df), columns = temp_df.columns) else: temp_df = pd.DataFrame(test_df, columns = preped....
Titanic - Machine Learning from Disaster
6,589,006
train_df, val_df = train_test_split(train_df, test_size=0.1, random_state=2018) embed_size = 300 max_features = 50000 maxlen = 100<prepare_x_and_y>
model, transformers, preped, train, test = fit_model(data, scale = True )
Titanic - Machine Learning from Disaster
6,589,006
train_X = train_df["question_text"].fillna("_na_" ).values val_X = val_df["question_text"].fillna("_na_" ).values test_X = test_df["question_text"].fillna("_na_" ).values<string_transform>
test_set = pd.read_csv('/kaggle/input/titanic/test.csv') predictions = predict(test_set, model, transformers) predictions.head()
Titanic - Machine Learning from Disaster
6,589,006
tokenizer = Tokenizer(num_words=max_features) tokenizer.fit_on_texts(list(train_X)) train_X = tokenizer.texts_to_sequences(train_X) val_X = tokenizer.texts_to_sequences(val_X) test_X = tokenizer.texts_to_sequences(test_X )<string_transform>
model.estimators_
Titanic - Machine Learning from Disaster
6,589,006
train_X = pad_sequences(train_X, maxlen=maxlen) val_X = pad_sequences(val_X, maxlen=maxlen) test_X = pad_sequences(test_X, maxlen=maxlen )<prepare_x_and_y>
predictions.to_csv('submission.csv', index = False )
Titanic - Machine Learning from Disaster
6,589,006
train_y = train_df['target'].values val_y = val_df['target'].values<feature_engineering>
test_labels = pd.read_csv('/kaggle/input/titanic-solutions-for-selfscoring/pub') accuracy_score(test_labels['survived'], predictions['Survived'] )
Titanic - Machine Learning from Disaster
6,556,041
embeddings_index = {} f = open('.. /input/embeddings/glove.840B.300d/glove.840B.300d.txt') for line in tqdm(f): values = line.split(" ") word = values[0] coefs = np.asarray(values[1:], dtype='float32') embeddings_index[word] = coefs f.close() print('Found %s word vectors.' % len(embeddings_index))<define_variables>
gender_submission = pd.read_csv(".. /input/titanic/gender_submission.csv") test = pd.read_csv(".. /input/titanic/test.csv") train = pd.read_csv(".. /input/titanic/train.csv" )
Titanic - Machine Learning from Disaster
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all_embs = np.stack(embeddings_index.values()) emb_mean,emb_std = all_embs.mean() , all_embs.std() embed_size = all_embs.shape[1]<feature_engineering>
test2 = pd.read_csv(".. /input/titanic/test.csv" )
Titanic - Machine Learning from Disaster
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word_index = tokenizer.word_index nb_words = min(max_features, len(word_index)) embedding_matrix = np.random.normal(emb_mean, emb_std,(nb_words, embed_size)) for word, i in word_index.items() : if i >= max_features: continue embedding_vector = embeddings_index.get(word) if embedding_vector is not None: embedding_matri...
warnings.simplefilter('ignore')
Titanic - Machine Learning from Disaster
6,556,041
class Attention(Layer): def __init__(self, step_dim, W_regularizer=None, b_regularizer=None, W_constraint=None, b_constraint=None, bias=True, **kwargs): self.supports_masking = True self.init = initializers.get('glorot_uniform') self.W_regularizer = regularizers.get(W_regularizer) self.b_regularizer = regularizers.ge...
print('Train columns with null values: ', train.isnull().sum()) print("-" * 10) print('Test columns with null values: ', test.isnull().sum()) print("-" * 10 )
Titanic - Machine Learning from Disaster
6,556,041
model=Sequential() model.add(Embedding(max_features, embed_size, weights=[embedding_matrix],input_length=maxlen,trainable = False)) model.add(Bidirectional(CuDNNLSTM(128, return_sequences=True))) model.add(Bidirectional(CuDNNLSTM(64, return_sequences=True))) model.add(Attention(maxlen)) model.add(Dense(64, activation...
dropping = ['PassengerId', 'Ticket','Cabin','Fare'] train.drop(dropping,axis=1, inplace=True) test.drop(dropping,axis=1, inplace=True) train.head()
Titanic - Machine Learning from Disaster
6,556,041
model.fit(train_X, train_y, batch_size=512, epochs=3, validation_data=(val_X, val_y))<compute_test_metric>
data = [train,test] for dataset in data: dataset['Embarked'].fillna(dataset['Embarked'].mode() [0],inplace=True) Embarked = np.zeros(len(dataset)) Embarked[dataset['Embarked']== 'C'] = 1 Embarked[dataset['Embarked']== 'Q'] = 2 Embarked[dataset['Embarked']== 'S'] = 3 dataset['Embarked'] = Embarked
Titanic - Machine Learning from Disaster
6,556,041
model.evaluate(x=val_X, y=val_y, batch_size=1024, verbose=1 )<predict_on_test>
train['Age'].fillna(train['Age'].median() , inplace = True) test['Age'].fillna(test['Age'].median() , inplace = True )
Titanic - Machine Learning from Disaster
6,556,041
test_y_prediction = model.predict(test_X, batch_size = 1024, verbose = 1 )<predict_on_test>
print('Train columns with null values: ', train.isnull().sum()) print("-" * 10) print('Test columns with null values: ', test.isnull().sum()) print("-" * 10 )
Titanic - Machine Learning from Disaster
6,556,041
pred_val_y = model.predict([val_X], batch_size=1024, verbose=1 )<compute_test_metric>
data = [train,test] for dataset in data: dataset['Age'] = dataset['Age'] dataset.loc[ dataset['Age'] <= 11, 'Age'] = 0 dataset.loc[(dataset['Age'] > 11)&(dataset['Age'] <= 18), 'Age'] = 1 dataset.loc[(dataset['Age'] > 18)&(dataset['Age'] <= 22), 'Age'] = 2 dataset.loc[(dataset['Age'] > 22)&(dataset['Age'] <= 27), 'Age'...
Titanic - Machine Learning from Disaster
6,556,041
for thresh in np.arange(0.1, 0.501, 0.01): thresh = np.round(thresh, 2) print("F1 score at threshold {0} is {1}".format(thresh, metrics.f1_score(val_y,(pred_val_y>thresh ).astype(int))))<save_to_csv>
data = [train,test] titles = {"Mr": 1, "Miss": 2, "Mrs": 3, "Master": 4, "Rare": 5} for dataset in data: dataset['Title'] = dataset.Name.str.extract('([A-Za-z]+)\.', expand=False) dataset['Title'] = dataset['Title'].replace(['Lady', 'Countess','Capt', 'Col','Don', 'Dr',\ 'Major', 'Rev', 'Sir', 'Jonkheer', 'Dona'], 'Ra...
Titanic - Machine Learning from Disaster
6,556,041
pred_test_y =(test_y_prediction>0.40 ).astype(int) out_df = pd.DataFrame({"qid":test_df["qid"].values}) out_df['prediction'] = pred_test_y out_df.to_csv("submission.csv", index=False )<import_modules>
data = [train,test] for dataset in data: sex = np.zeros(len(dataset)) sex[dataset['Sex']== 'male'] = 1 sex[dataset['Sex']== 'female'] = 0 dataset['Sex'] = sex
Titanic - Machine Learning from Disaster
6,556,041
import os import time import numpy as np import pandas as pd from tqdm import tqdm import math from sklearn.model_selection import train_test_split from sklearn import metrics from keras.preprocessing.text import Tokenizer from keras.preprocessing.sequence import pad_sequences from keras.layers import Dense, Input, CuD...
data = [train,test] for dataset in data: dataset['FamilySize'] = dataset['SibSp'] + dataset['Parch'] + 1
Titanic - Machine Learning from Disaster
6,556,041
train_df = pd.read_csv(".. /input/train.csv") test_df = pd.read_csv(".. /input/test.csv") print("Train shape : ",train_df.shape) print("Test shape : ",test_df.shape )<split>
data = [train,test] for dataset in data: dataset['IsAlone'] = 0 dataset.loc[dataset['FamilySize'] == 1, 'IsAlone'] = 1
Titanic - Machine Learning from Disaster
6,556,041
train_df, val_df = train_test_split(train_df, test_size=0.08, random_state=2018) embed_size = 300 max_features = 95000 maxlen = 70 train_X = train_df["question_text"].fillna("_ val_X = val_df["question_text"].fillna("_ test_X = test_df["question_text"].fillna("_ tokenizer = Tokenizer(num_words=max_features) tokenizer...
train = train.drop(['Parch', 'SibSp', 'FamilySize'], axis=1) test = test.drop(['Parch', 'SibSp', 'FamilySize'], axis=1 )
Titanic - Machine Learning from Disaster
6,556,041
np.random.seed(2018) trn_idx = np.random.permutation(len(train_X)) val_idx = np.random.permutation(len(val_X)) train_X = train_X[trn_idx] val_X = val_X[val_idx] train_y = train_y[trn_idx] val_y = val_y[val_idx]<train_model>
train_y=train['Survived'] train_ft=train.drop('Survived',axis=1) kf = StratifiedKFold(n_splits=10) print(train_ft.head()) print(train_y.head() )
Titanic - Machine Learning from Disaster
6,556,041
<set_options>
svc = SVC(C = 45, gamma = 0.03) svc.fit(train_ft, train_y) acc_SVM = cross_val_score(svc,train_ft,train_y,cv=kf) print(acc_SVM.mean() )
Titanic - Machine Learning from Disaster
6,556,041
class Attention(Layer): def __init__(self, step_dim, W_regularizer=None, b_regularizer=None, W_constraint=None, b_constraint=None, bias=True, **kwargs): self.supports_masking = True self.init = initializers.get('glorot_uniform') self.W_regularizer = regularizers.get(W_regularizer) self.b_regularizer = regularizers.ge...
predictions = svc.predict(test) print(predictions )
Titanic - Machine Learning from Disaster
6,556,041
<train_model><EOS>
submission = pd.DataFrame({ 'PassengerId': test2['PassengerId'], 'Survived': predictions }) submission.to_csv('submission.csv', index = False )
Titanic - Machine Learning from Disaster
6,053,002
<SOS> metric: categorizationaccuracy Kaggle data source: titanic-machine-learning-from-disaster<predict_on_test>
for dirname, _, filenames in os.walk('/kaggle/input'): for filename in filenames: print(os.path.join(dirname, filename))
Titanic - Machine Learning from Disaster
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pred_glove_val_y = model.predict([val_X], batch_size=1024, verbose=1) for thresh in np.arange(0.1, 0.501, 0.01): thresh = np.round(thresh, 2) print("F1 score at threshold {0} is {1}".format(thresh, metrics.f1_score(val_y,(pred_glove_val_y>thresh ).astype(int))))<predict_on_test>
df = pd.read_csv('.. /input/titanic/train.csv') df.head()
Titanic - Machine Learning from Disaster
6,053,002
pred_glove_test_y = model.predict([test_X], batch_size=1024, verbose=1 )<set_options>
df.columns[df.isna().any() ]
Titanic - Machine Learning from Disaster
6,053,002
del word_index, embeddings_index, all_embs, embedding_matrix, model, inp, x time.sleep(10 )<statistical_test>
df['Age'].fillna(df['Age'].mean() , inplace=True) df['Embarked'].fillna('S', inplace=True) df.set_index('PassengerId', inplace=True) df['Sex'] = df['Sex'].astype('category') df['Sex'] = df['Sex'].cat.codes df['Embarked'] = df['Embarked'].astype('category') df['Embarked'] = df['Embarked'].cat.codes df.head()
Titanic - Machine Learning from Disaster
6,053,002
EMBEDDING_FILE = '.. /input/embeddings/wiki-news-300d-1M/wiki-news-300d-1M.vec' def get_coefs(word,*arr): return word, np.asarray(arr, dtype='float32') embeddings_index = dict(get_coefs(*o.split(" ")) for o in open(EMBEDDING_FILE)if len(o)>100) all_embs = np.stack(embeddings_index.values()) emb_mean,emb_std = all_em...
def convertRanges(data): _, bins = pd.qcut(data, 5, retbins=True) for i in range(len(data.values)) : x = data.values[i] if(x>=bins[0] and x<bins[1]): x = 1 elif(x>=bins[1] and x<bins[2]): x = 2 elif(x>=bins[2] and x<bins[3]): x = 3 elif(x>=bins[3] and x<bins[4]): x = 4 elif(x>=bins[4] and x<=bins[5]): x = 5 data.value...
Titanic - Machine Learning from Disaster
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model.fit(train_X, train_y, batch_size=512, epochs=3, validation_data=(val_X, val_y))<predict_on_test>
df['Age'] = convertRanges(df['Age']) df['Fare'] = convertRanges(df['Fare']) df.head()
Titanic - Machine Learning from Disaster
6,053,002
pred_fasttext_val_y = model.predict([val_X], batch_size=1024, verbose=1) for thresh in np.arange(0.1, 0.501, 0.01): thresh = np.round(thresh, 2) print("F1 score at threshold {0} is {1}".format(thresh, metrics.f1_score(val_y,(pred_fasttext_val_y>thresh ).astype(int))))<predict_on_test>
classifiers = [ KNeighborsClassifier(3), SVC(kernel="linear", C=0.025), SVC(gamma=2, C=1), GaussianProcessClassifier(1.0 * RBF(1.0)) , DecisionTreeClassifier(max_depth=5), RandomForestClassifier(max_depth=5, n_estimators=10, max_features=1), MLPClassifier(alpha=1, max_iter=1000), AdaBoostClassifier() , GaussianNB() , Q...
Titanic - Machine Learning from Disaster
6,053,002
pred_fasttext_test_y = model.predict([test_X], batch_size=1024, verbose=1 )<set_options>
df = pd.read_csv('.. /input/titanic/test.csv') df.head()
Titanic - Machine Learning from Disaster
6,053,002
del word_index, embeddings_index, all_embs, embedding_matrix, model, inp, x time.sleep(10 )<statistical_test>
df.columns[df.isna().any() ]
Titanic - Machine Learning from Disaster
6,053,002
EMBEDDING_FILE = '.. /input/embeddings/paragram_300_sl999/paragram_300_sl999.txt' def get_coefs(word,*arr): return word, np.asarray(arr, dtype='float32') embeddings_index = dict(get_coefs(*o.split(" ")) for o in open(EMBEDDING_FILE, encoding="utf8", errors='ignore')if len(o)>100) all_embs = np.stack(embeddings_index....
df['Age'].fillna(df['Age'].mean() , inplace=True) df['Fare'].fillna(df['Fare'].mean() , inplace=True) df['Age'] = convertRanges(df['Age']) df['Fare'] = convertRanges(df['Fare']) df['Sex'] = df['Sex'].astype('category') df['Sex'] = df['Sex'].cat.codes df['Embarked'] = df['Embarked'].astype('category') df['Embarked...
Titanic - Machine Learning from Disaster
6,053,002
<predict_on_test><EOS>
X_test = df.iloc[:,1:].values y_test = model.predict(X_test) pred = pd.DataFrame({"PassengerId": df.iloc[:,0].values, "Survived": y_test}) pred.to_csv('results.csv', index=False, header=True )
Titanic - Machine Learning from Disaster
4,881,309
<SOS> metric: categorizationaccuracy Kaggle data source: titanic-machine-learning-from-disaster<predict_on_test>
warnings.filterwarnings("ignore" )
Titanic - Machine Learning from Disaster
4,881,309
pred_paragram_test_y = model.predict([test_X], batch_size=1024, verbose=1 )<set_options>
train = pd.read_csv(".. /input/train.csv") test = pd.read_csv(".. /input/test.csv" )
Titanic - Machine Learning from Disaster
4,881,309
del word_index, embeddings_index, all_embs, embedding_matrix, model, inp, x time.sleep(10 )<compute_test_metric>
train = pd.read_csv(".. /input/train.csv") test = pd.read_csv(".. /input/test.csv" )
Titanic - Machine Learning from Disaster
4,881,309
pred_val_y = 0.39*pred_glove_val_y + 0.41*pred_fasttext_val_y + 0.39*pred_paragram_val_y for thresh in np.arange(0.1, 0.501, 0.01): thresh = np.round(thresh, 2) print("F1 score at threshold {0} is {1}".format(thresh, metrics.f1_score(val_y,(pred_val_y>thresh ).astype(int))))<save_to_csv>
combine = pd.concat([train,test],sort = True,ignore_index=True )
Titanic - Machine Learning from Disaster
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pred_test_y = 0.35*pred_glove_test_y + 0.42*pred_fasttext_test_y + 0.35*pred_paragram_test_y pred_test_y =(pred_test_y>0.42 ).astype(int) out_df = pd.DataFrame({"qid":test_df["qid"].values}) out_df['prediction'] = pred_test_y out_df.to_csv("submission.csv", index=False )<import_modules>
combine["Surname"] = combine["Name"].str.split(",",expand = True)[0] combine["Surname"] = combine["Surname"].str.split("-",expand = True)[0] combine[["Name","Surname"]].head(2 )
Titanic - Machine Learning from Disaster
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from keras.preprocessing.text import Tokenizer from keras.preprocessing.sequence import pad_sequences import os import numpy as np import pandas as pd from tqdm import tqdm import math from sklearn.model_selection import train_test_split<load_from_csv>
for name in combine.Surname.values: combine.loc[combine.Surname==name,"Surname_Counts"]=combine[combine.Surname==name].shape[0] combine[["Surname","Surname_Counts"]].head(2 )
Titanic - Machine Learning from Disaster
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train_df = pd.read_csv(".. /input/train.csv") train_df, val_df = train_test_split(train_df, test_size=0.1 )<feature_engineering>
combine['Title'] = combine.Name.str.extract('([A-Za-z]+)\.', expand=False )
Titanic - Machine Learning from Disaster
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embeddings_index = {} f = open('.. /input/embeddings/glove.840B.300d/glove.840B.300d.txt') for line in tqdm(f): values = line.split(" ") word = values[0] coefs = np.asarray(values[1:], dtype='float32') embeddings_index[word] = coefs f.close() print('Found %s word vectors.' % len(embeddings_index))<prepare_x_and_y>
for i,j in combine.groupby(["Sex"]): j_title_list = set(list(j.Title.values)) print(i,j_title_list )
Titanic - Machine Learning from Disaster
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def text_to_array(text): empyt_emb = np.zeros(300) text = text[:-1].split() [:100] embeds = [embeddings_index.get(x, empyt_emb)for x in text] embeds+= [empyt_emb] *(100 - len(embeds)) return np.array(embeds) val_vects = np.array([text_to_array(X_text)for X_text in tqdm(val_df["question_text"][:5000])]) val_y = np.ar...
survival_1 = combine[(combine.Gender=="Boy")&(combine.Pclass.isin([1,2])) ]["Survived"].mean() survival_2 = combine[(combine.Sex=="male")&(combine.Age<16)&(combine.Pclass.isin([1,2])) ]["Survived"].mean() survival_3 = combine[(((combine.Sex=="male")&(combine.Age<16)) |(combine.Gender=="Boy")) &(combine.Pclass.isin([1,2...
Titanic - Machine Learning from Disaster
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batch_size = 128 def batch_gen(train_df): n_batches = math.ceil(len(train_df)/ batch_size) while True: train_df = train_df.sample(frac=1.) for i in range(n_batches): texts = train_df.iloc[i*batch_size:(i+1)*batch_size, 1] text_arr = np.array([text_to_array(text)for text in texts]) yield text_arr, np.array(train_df["t...
combine.loc[(combine.Sex=="male")&(combine.Age<16),"Gender"]="Boy"
Titanic - Machine Learning from Disaster
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from keras.models import Sequential, Input from keras.models import Model from keras.layers import concatenate, GlobalAveragePooling1D, GlobalMaxPooling1D, CuDNNLSTM, CuDNNGRU, Dense, Bidirectional, SpatialDropout1D, Conv1D<define_search_model>
combine.drop(["Title","Sex"],axis = 1,inplace=True )
Titanic - Machine Learning from Disaster
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dr = 0.25 units = 96 inp = Input(shape =(( 100, 300))) x1 = SpatialDropout1D(dr )(inp) x = Bidirectional(CuDNNGRU(units, return_sequences = True))(x1) x = Conv1D(64, kernel_size = 2, padding = "valid", kernel_initializer = "he_uniform" )(x) y = Bidirectional(CuDNNLSTM(units, return_sequences = True))(x1) y = Conv1...
combine_female = combine[combine.Gender == "Woman"] combine_female.reset_index(inplace = True) for i,name in enumerate(list(combine_female.Name.values)) : name = str(name) name = re.sub("\\s$","",name) name = re.sub(".*[^\\)]$","",name) name = re.sub(".*\\s (.*)\\)$","\\1",name) name = re.sub("^\\(","",name) comb...
Titanic - Machine Learning from Disaster
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mg = batch_gen(train_df) model.fit_generator(mg, epochs=30, steps_per_epoch=1000, validation_data=(val_vects, val_y), verbose=True )<define_variables>
for id in combine_female.PassengerId.values: id2 = int(id) name = combine_female[combine_female.PassengerId==id]["Maiden_name"].values combine.loc[combine.PassengerId==id2,"Maiden"] = name combine[["Name","Maiden"]].head(2 )
Titanic - Machine Learning from Disaster
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batch_size = 256 def batch_gen(test_df): n_batches = math.ceil(len(test_df)/ batch_size) for i in range(n_batches): texts = test_df.iloc[i*batch_size:(i+1)*batch_size, 1] text_arr = np.array([text_to_array(text)for text in texts]) yield text_arr test_df = pd.read_csv(".. /input/test.csv") all_preds = [] for x in tqd...
combine.loc[combine.Maiden=="","Maiden"]=nan
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all_preds_val = [] for x in tqdm(batch_gen(val_df)) : all_preds_val.extend(model.predict(x ).flatten() )<prepare_x_and_y>
for mai in combine.Maiden.values: combine.loc[combine.Maiden==mai,"Maiden_Counts"]=combine[combine.Maiden==mai].shape[0] combine[["Maiden","Maiden_Counts"]].head(2 )
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val_y = val_df["target"].values<import_modules>
combine["Family_size"] = combine["Parch"]+combine["SibSp"]+1 combine[["Name","Surname_Counts","Maiden_Counts","Family_size"]].head(2 )
Titanic - Machine Learning from Disaster
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from sklearn.metrics import f1_score<compute_test_metric>
pclass_gender_list = [] for pclass,gender in zip(combine.Pclass.values,combine.Gender.values): pclass_gender = "P"+str(pclass)+"-"+str(gender) pclass_gender_list = pclass_gender_list+[pclass_gender]
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y_val =(np.array(all_preds_val)> 0.1 ).astype(np.int) f1_score(val_y, y_val )<compute_test_metric>
combine["Pclass_Gender"] = pclass_gender_list combine[["Pclass","Gender","Pclass_Gender"]].head(2 )
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f1_score(val_y, y_val )<compute_test_metric>
combine["Ticket"].value_counts() [:5]
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score = 0 thresh =.5 for i in np.arange(0.1, 0.991, 0.01): y_val =(np.array(all_preds_val)> i ).astype(np.int) temp_score = f1_score(val_y, y_val) if(temp_score > score): score = temp_score thresh = i print("CV: {}, Threshold: {}".format(score, thresh))<save_to_csv>
combine["Ticket_new"] = combine["Ticket"].str.extract('([0-9]+)$',expand = False )
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y_te =(np.array(all_preds)> thresh ).astype(np.int) submit_df = pd.DataFrame({"qid": test_df["qid"], "prediction": y_te}) submit_df.to_csv("submission.csv", index=False )<import_modules>
combine[combine.Ticket_new.isna() ][["Ticket","Ticket_new"]]
Titanic - Machine Learning from Disaster
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from keras.preprocessing.text import Tokenizer from keras.preprocessing.sequence import pad_sequences import os import numpy as np import pandas as pd from tqdm import tqdm import math from sklearn.model_selection import train_test_split<define_variables>
combine.loc[combine.Ticket_new.isna() ,"Ticket_new"]="LINE"
Titanic - Machine Learning from Disaster
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SEQ_LEN = 100<load_from_csv>
for i,tic in enumerate(combine.Ticket_new.values): combine.loc[i,"Ticket"] = tic combine.drop(["Ticket_new"],axis = 1,inplace = True )
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train_df = pd.read_csv(".. /input/train.csv") train_df, val_df = train_test_split(train_df, test_size=0.07 )<feature_engineering>
combine["Ticket"].value_counts() [:5]
Titanic - Machine Learning from Disaster
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embeddings_index = {} f = open('.. /input/embeddings/glove.840B.300d/glove.840B.300d.txt') for line in tqdm(f): values = line.split(" ") word = values[0] coefs = np.asarray(values[1:], dtype='float32') embeddings_index[word] = coefs f.close() print('Found %s word vectors.' % len(embeddings_index))<string_transform>
tic_list = combine.Ticket.values for i in tic_list: combine.loc[combine["Ticket"]==i,"Ticket_Counts"] = combine[combine["Ticket"] == i].shape[0] combine[["Ticket","Ticket_Counts"]].head(2 )
Titanic - Machine Learning from Disaster
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_WORD_SPLIT = re.compile("([.,!?"':; )(])") _DIGIT_RE = re.compile(br"\d") STOP_WORDS = "" ' [ ]., ! : ; ?".split(" ") def basic_tokenizer(sentence): words = [] for space_separated_fragment in sentence.strip().split() : words.extend(_WORD_SPLIT.split(space_separated_fragment)) return [w.lower() for w in words if w...
for i,ti in enumerate(combine.Ticket.values): t = list(ti)[:-2]+list("xx") d = '' combine.loc[i,"Ticket2"] = d.join(t )
Titanic - Machine Learning from Disaster
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def text_to_array(text): empyt_emb = np.zeros(300) text = basic_tokenizer(text[:-1])[:SEQ_LEN] embeds = [embeddings_index.get(x, empyt_emb)for x in text] embeds+= [empyt_emb] *(SEQ_LEN - len(embeds)) return np.array(embeds) val_vects = np.array([text_to_array(X_text)for X_text in tqdm(val_df["question_text"][:3000])]...
tic2_list = combine.Ticket2.values for i in tic2_list: combine.loc[combine["Ticket2"]==i,"Ticket2_Counts"] = combine[combine["Ticket2"] == i].shape[0] combine[["Ticket","Ticket2","Ticket2_Counts"]].head(2 )
Titanic - Machine Learning from Disaster
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batch_size = 256 def batch_gen(train_df): n_batches = math.ceil(len(train_df)/ batch_size) while True: train_df = train_df.sample(frac=1.) for i in range(n_batches): texts = train_df.iloc[i*batch_size:(i+1)*batch_size, 1] text_arr = np.array([text_to_array(text)for text in texts]) yield text_arr, np.array(train_df["t...
have_cabin = combine[combine.Cabin.notna() ] have_cabin.reset_index(inplace = True) multi_cabin = [] single_cabin = [] for i,j in enumerate(have_cabin.Cabin.values): passid = have_cabin.loc[i].PassengerId if len(j)>4: multi_cabin = multi_cabin+[passid] else: single_cabin = single_cabin+[passid] print(multi_cabin )
Titanic - Machine Learning from Disaster
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from keras.models import Sequential,Model from keras.layers import CuDNNLSTM, Dense, Bidirectional, Input,Dropout from keras import backend as K from keras.engine.topology import Layer from keras import initializers, regularizers, constraints<choose_model_class>
cabin_title = have_cabin[have_cabin.PassengerId.isin(single_cabin)].Cabin.str.extract('^([A-Z])',expand=False) have_cabin.loc[have_cabin.PassengerId.isin(single_cabin),"Cabin_Title"] = cabin_title have_cabin[["Cabin","Cabin_Title"]].head(2 )
Titanic - Machine Learning from Disaster
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class Attention(Layer): def __init__(self, step_dim, W_regularizer=None, b_regularizer=None, W_constraint=None, b_constraint=None, bias=True, **kwargs): self.supports_masking = True self.init = initializers.get('glorot_uniform') self.W_regularizer = regularizers.get(W_regularizer) self.b_regularizer = regularizers.ge...
multi_cabin_title = [] for cabin in have_cabin[have_cabin.PassengerId.isin(multi_cabin)]["Cabin"].values: cabinA = cabin.split(" ")[0] cabinA_title = list(cabinA)[0] cabinB = cabin.split(" ")[1] cabinB_title = list(cabinB)[0] if cabinA_title==cabinB_title: multi_cabin_title = multi_cabin_title+[cabinA_title] else: mult...
Titanic - Machine Learning from Disaster
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inp = Input(shape=(SEQ_LEN,300)) x = Bidirectional(CuDNNLSTM(64, return_sequences=True))(inp) x = Bidirectional(CuDNNLSTM(64,return_sequences=True))(x) x = Attention(SEQ_LEN )(x) x = Dense(256, activation="relu" )(x) x = Dense(1, activation="sigmoid" )(x) model = Model(inputs=inp, outputs=x) model.compile(loss='b...
cabin_title_list = list(have_cabin.Cabin_Title.values) combine.loc[(combine.Cabin.notna()),"Cabin_Title"] = cabin_title_list combine[combine.Cabin.notna() ][["Cabin","Cabin_Title"]].head(2 )
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mg = batch_gen(train_df) model.fit_generator(mg, epochs=20, steps_per_epoch=1000, validation_data=(val_vects, val_y), verbose=True )<define_variables>
combine.loc[(combine.Fare.notna()),"Fare_PP"] = combine.Fare/combine.Ticket_Counts combine[["Fare","Fare_PP","Ticket_Counts"]].sample(5 )
Titanic - Machine Learning from Disaster
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batch_size = 256 def batch_gen(test_df): n_batches = math.ceil(len(test_df)/ batch_size) for i in range(n_batches): texts = test_df.iloc[i*batch_size:(i+1)*batch_size, 1] text_arr = np.array([text_to_array(text)for text in texts]) yield text_arr test_df = pd.read_csv(".. /input/test.csv") all_preds = [] for x in tqd...
combine[combine.Fare.isna() ]
Titanic - Machine Learning from Disaster
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y_te =(np.array(all_preds)> 0.35 ).astype(np.int) submit_df = pd.DataFrame({"qid": test_df["qid"], "prediction": y_te}) submit_df.to_csv("submission.csv", index=False )<import_modules>
combine.loc[(combine.Fare_PP.isna()),"Fare_PP"] = combine[(combine.Embarked=="S")&(combine.Pclass==3)]["Fare_PP"].median() combine.loc[(combine.Fare.isna()),"Fare"] = combine[(combine.Embarked=="S")&(combine.Pclass==3)]["Fare_PP"].median()
Titanic - Machine Learning from Disaster
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import os import time import numpy as np import pandas as pd from tqdm import tqdm import math from sklearn.model_selection import train_test_split from sklearn import metrics from keras.preprocessing.text import Tokenizer from keras.preprocessing.sequence import pad_sequences from keras.layers import Dense, Input, LST...
multi_ticket = list(combine[(combine.Ticket_Counts>=2)&(combine.Cabin_Title.notna())]["Ticket"].values) len(set(multi_ticket))
Titanic - Machine Learning from Disaster
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train_df = pd.read_csv(".. /input/train.csv") test_df = pd.read_csv(".. /input/test.csv") print("Train shape : ",train_df.shape) print("Test shape : ",test_df.shape )<split>
multi_ticket_cabin = combine[(combine.Cabin_Title.notna())&(combine.Ticket_Counts>=2)][["Ticket","Cabin_Title"]] same_ticket_differ_cabin = [] for i,j in multi_ticket_cabin.groupby(["Ticket"]): differ_cabin = set(list(j.Cabin_Title.values)) if len(differ_cabin)>=2: same_ticket_differ_cabin = same_ticket_differ_cabin+[i...
Titanic - Machine Learning from Disaster
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train_df, val_df = train_test_split(train_df, test_size=0.1, random_state=2018) embed_size = 300 max_features = 50000 maxlen = 100 train_X = train_df["question_text"].fillna("_na_" ).values val_X = val_df["question_text"].fillna("_na_" ).values test_X = test_df["question_text"].fillna("_na_" ).values tokenizer = Token...
need_filling = list(combine[(combine.Ticket.isin(multi_ticket)) &(combine.Cabin.isna())].PassengerId.values) for passid in need_filling: ticket = list(combine[combine.PassengerId==passid]["Ticket"].values) cabin_title = combine[combine.Ticket.isin(ticket)]["Cabin_Title"].describe() ["top"] combine.loc[combine.Passeng...
Titanic - Machine Learning from Disaster
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inp = Input(shape=(maxlen,)) x = Embedding(max_features, embed_size )(inp) x = Bidirectional(CuDNNGRU(64, return_sequences=True))(x) x = GlobalMaxPool1D()(x) x = Dense(16, activation="relu" )(x) x = Dropout(0.1 )(x) x = Dense(1, activation="sigmoid" )(x) model = Model(inputs=inp, outputs=x) model.compile(loss='b...
combine.drop(["Cabin","Fare"],axis = 1,inplace = True )
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model.fit(train_X, train_y, batch_size=512, epochs=2, validation_data=(val_X, val_y))<predict_on_test>
need_check = combine[(combine.PassengerId.isin(maybe_wrong)) &(combine.Ticket_Counts==1)]["PassengerId"].values need_check
Titanic - Machine Learning from Disaster
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pred_noemb_val_y = model.predict([val_X], batch_size=1024, verbose=1) for thresh in np.arange(0.1, 0.501, 0.01): thresh = np.round(thresh, 2) print("F1 score at threshold {0} is {1}".format(thresh, metrics.f1_score(val_y,(pred_noemb_val_y>thresh ).astype(int))))<predict_on_test>
def get_from_passid(dataset,passid_list): return dataset[dataset.PassengerId.isin(passid_list)][['Age', 'Cabin_Title', 'Embarked', 'Name', 'Parch', 'SibSp','Ticket', 'Ticket2', 'Surname','Maiden',"Ticket_Counts", 'Pclass_Gender', 'Family_size',"Survived"]] def get_from_name(dataset,name_list): return dataset[(dataset.S...
Titanic - Machine Learning from Disaster
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pred_noemb_test_y = model.predict([test_X], batch_size=1024, verbose=1 )<set_options>
combine[(combine.Ticket2=="175xx")&(combine.Cabin_Title=="C")&(combine.Embarked=="C")&(combine.Family_size>=2)&(combine.Pclass==1)]
Titanic - Machine Learning from Disaster
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del model, inp, x time.sleep(10 )<statistical_test>
combine[(( combine.Age<=3)|(combine.Age>=32)) &(combine.Embarked=="S")&(combine.Family_size>=2) &(combine.Ticket2=="2506xx")&(combine.Pclass==2)][['Age', 'Cabin_Title', 'Embarked', 'Name', 'Parch', 'SibSp','Ticket', 'Ticket2', 'Surname','Maiden',"Ticket_Counts", 'Pclass_Gender', 'Family_size']]
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EMBEDDING_FILE = '.. /input/embeddings/glove.840B.300d/glove.840B.300d.txt' def get_coefs(word,*arr): return word, np.asarray(arr, dtype='float32') embeddings_index = dict(get_coefs(*o.split(" ")) for o in open(EMBEDDING_FILE)) all_embs = np.stack(embeddings_index.values()) emb_mean,emb_std = all_embs.mean() , all_em...
combine[(combine.Embarked=="S")&(combine.Ticket2=="3470xx")&(combine.Pclass==3)&(combine.Family_size==2)][['Age', 'Cabin_Title', 'Embarked', 'Name', 'Parch', 'SibSp','Ticket', 'Surname', 'Maiden', 'Pclass_Gender', 'Family_size', 'Surname_Counts', 'Ticket_Counts',"Maiden_Counts","Survived"]]
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model.fit(train_X, train_y, batch_size=512, epochs=2, validation_data=(val_X, val_y))<predict_on_test>
combine.loc[combine.PassengerId.isin([137]),"Maiden"] = "Monypeny" combine.loc[combine.Maiden.isin(["Monypeny"]),"Maiden_Counts"] = 2 combine.loc[combine.PassengerId.isin([274]),"Parch"] = 0 combine.loc[combine.PassengerId.isin([274]),"Family_size"] = 1 combine.loc[combine.PassengerId.isin([418]),"Parch"] = 0 combine.l...
Titanic - Machine Learning from Disaster
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pred_glove_val_y = model.predict([val_X], batch_size=1024, verbose=1) for thresh in np.arange(0.1, 0.501, 0.01): thresh = np.round(thresh, 2) print("F1 score at threshold {0} is {1}".format(thresh, metrics.f1_score(val_y,(pred_glove_val_y>thresh ).astype(int))))<predict_on_test>
test_error = pd.DataFrame(columns=["Category","Train_data","Test_data","Error_Counts","Error_Probability"]) def get_error_counts(pg,index): PG_train_size = combine[(combine.Pclass_Gender.isin(pg)) &(combine.Survived.notna())].shape[0] PG_test_size = combine[(combine.Pclass_Gender.isin(pg)) &(combine.Survived.isna())]....
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pred_glove_test_y = model.predict([test_X], batch_size=1024, verbose=1 )<set_options>
combine.loc[(combine.Pclass_Gender.isin(["P1-Boy","P2-Boy","P1-Woman","P2-Woman"])) ,"Predict"] = 1 combine.loc[(combine.Pclass_Gender=="P2-Man"),"Predict"] = 0
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del word_index, embeddings_index, all_embs, embedding_matrix, model, inp, x time.sleep(10 )<statistical_test>
have_family = combine[combine.Family_size>=2]
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EMBEDDING_FILE = '.. /input/embeddings/wiki-news-300d-1M/wiki-news-300d-1M.vec' def get_coefs(word,*arr): return word, np.asarray(arr, dtype='float32') embeddings_index = dict(get_coefs(*o.split(" ")) for o in open(EMBEDDING_FILE)if len(o)>100) all_embs = np.stack(embeddings_index.values()) emb_mean,emb_std = all_em...
have_family[have_family.Ticket2_Counts==1][['Age','Cabin_Title', 'Embarked','Pclass_Gender','Name', "Surname",'Maiden', 'Parch','SibSp', 'Family_size','Ticket',"Ticket_Counts"]]
Titanic - Machine Learning from Disaster