Update README.md

README.md

@@ -14,7 +14,7 @@ pipeline_tag: text-classification
 [![PyPI version qa-metrics](https://img.shields.io/pypi/v/qa-metrics.svg)](https://pypi.org/project/qa-metrics/) 
 [![Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/drive/17b7vrZqH0Yun2AJaOXydYZxr3cw20Ga6?usp=sharing)
 
-QA-Evaluation-Metrics is a fast and lightweight Python package for evaluating question-answering models and prompting of black-box and open-source large language models. It provides various efficient and basic metrics to assess the performance of QA models.  
+QA-Evaluation-Metrics is a fast and lightweight Python package for evaluating question-answering models and prompting of black-box and open-source large language models. It provides various basic and efficient metrics to assess the performance of QA models. 
 
 ### Updates
 - Uopdated to version 0.2.8 
@@ -33,51 +33,29 @@ To install the package, run the following command:
 pip install qa-metrics
 ```
 
-## Usage
+## Usage/Logistics
 
-The python package currently provides six QA evaluation methods.
+The python package currently provides six QA evaluation methods. 
+- Given a set of gold answers, a candidate answer to be evaluated, and a question (if applicable), the evaluation returns True if the candidate answer matches any one of the gold answer, False otherwise.
+- Different evaluation methods have distinct strictness of evaluating the correctness of a candidate answer. Some have higher correlation with human judgments than others.
+- Normalized Exact Match and Question/Answer type Evaluation are the most efficient method. They are suitable for short-form QA datasets such as NQ-OPEN, Hotpot QA, TriviaQA, SQuAD, etc.
+- Question/Answer Type Evaluation and Transformer Neural evaluations are cost free and suitable for short-form and longer-form QA datasets. They have higher correlation with human judgments than exact match and F1 score when the length of the gold and candidate answers become long.
+- Black-box LLM evaluations are closest to human evaluations, and they are not cost-free.
 
-#### Prompting LLM For Evaluation
+## Normalized Exact Match
+#### `em_match`
 
-Note: The prompting function can be used for any prompting purposes.
+Returns a boolean indicating whether there are any exact normalized matches between gold and candidate answers.
 
-###### OpenAI
-```python
-from qa_metrics.prompt_llm import CloseLLM
-model = CloseLLM()
-model.set_openai_api_key(YOUR_OPENAI_KEY)
-prompt = 'question: What is the Capital of France?\nreference: Paris\ncandidate: The capital is Paris\nIs the candidate answer correct based on the question and reference answer? Please only output correct or incorrect.'
-model.prompt_gpt(prompt=prompt, model_engine='gpt-3.5-turbo', temperature=0.1, max_tokens=10)
+**Parameters**
 
-'''
-'correct'
-'''
-```
+- `reference_answer` (list of str): A list of gold (correct) answers to the question.
+- `candidate_answer` (str): The answer provided by a candidate that needs to be evaluated.
 
-###### Anthropic
-```python
-model = CloseLLM()
-model.set_anthropic_api_key(YOUR_Anthropic_KEY)
-model.prompt_claude(prompt=prompt, model_engine='claude-v1', anthropic_version="2023-06-01", max_tokens_to_sample=100, temperature=0.7)
-
-'''
-'correct'
-'''
-```
+**Returns**
 
-###### deepinfra (See below for descriptions of more models)
-```python
-from qa_metrics.prompt_open_llm import OpenLLM
-model = OpenLLM()
-model.set_deepinfra_key(YOUR_DEEPINFRA_KEY)
-model.prompt(message=prompt, model_engine='mistralai/Mixtral-8x7B-Instruct-v0.1', temperature=0.1, max_tokens=10)
-
-'''
-'correct'
-'''
-```
+- `boolean`: A boolean True/False signifying matches between reference or candidate answers.
 
-#### Exact Match
 ```python
 from qa_metrics.em import em_match
 
@@ -90,38 +68,80 @@ Exact Match:  False
 '''
 ```
 
-#### Transformer Match
-Our fine-tuned BERT model is this repository. Our Package also supports downloading and matching directly. distilroberta, distilbert, and roberta are also supported now! 🔥🔥🔥
+## F1 Score
+#### `f1_score_with_precision_recall`
 
-```python
-from qa_metrics.transformerMatcher import TransformerMatcher
+Calculates F1 score, precision, and recall between a reference and a candidate answer.
 
-question = "Which movie is loosley based off the Brother Grimm's Iron Henry?"
-tm = TransformerMatcher("bert")
-scores = tm.get_scores(reference_answer, candidate_answer, question)
-match_result = tm.transformer_match(reference_answer, candidate_answer, question)
-print("Score: %s; TM Match: %s" % (scores, match_result))
-'''
-Score: {'The Frog Prince': {'The movie "The Princess and the Frog" is loosely based off the Brother Grimm\'s "Iron Henry"': 0.88954514}, 'The Princess and the Frog': {'The movie "The Princess and the Frog" is loosely based off the Brother Grimm\'s "Iron Henry"': 0.9381995}}; TM Match: True
-'''
-```
+**Parameters**
+
+- `reference_answer` (str): A gold (correct) answers to the question.
+- `candidate_answer` (str): The answer provided by a candidate that needs to be evaluated.
+
+**Returns**
+
+- `dictionary`: A dictionary containing the F1 score, precision, and recall between a gold and candidate answer.
 
-#### F1 Score
 ```python
 from qa_metrics.f1 import f1_match,f1_score_with_precision_recall
 
 f1_stats = f1_score_with_precision_recall(reference_answer[0], candidate_answer)
 print("F1 stats: ", f1_stats)
+'''
+F1 stats:  {'f1': 0.25, 'precision': 0.6666666666666666, 'recall': 0.15384615384615385}
+'''
 
 match_result = f1_match(reference_answer, candidate_answer, threshold=0.5)
 print("F1 Match: ", match_result)
 '''
-F1 stats:  {'f1': 0.25, 'precision': 0.6666666666666666, 'recall': 0.15384615384615385}
 F1 Match:  False
 '''
 ```
 
-#### PANDA Match
+## Efficient and Robust Question/Answer Type Evaluation
+#### 1. `get_highest_score`
+
+Returns the gold answer and candidate answer pair that has the highest matching score. This function is useful for evaluating the closest match to a given candidate response based on a list of reference answers.
+
+**Parameters**
+
+- `reference_answer` (list of str): A list of gold (correct) answers to the question.
+- `candidate_answer` (str): The answer provided by a candidate that needs to be evaluated.
+- `question` (str): The question for which the answers are being evaluated.
+
+**Returns**
+
+- `dictionary`: A dictionary containing the gold answer and candidate answer that have the highest matching score.
+
+#### 2. `get_scores`
+
+Returns all the gold answer and candidate answer pairs' matching scores.
+
+**Parameters**
+
+- `reference_answer` (list of str): A list of gold (correct) answers to the question.
+- `candidate_answer` (str): The answer provided by a candidate that needs to be evaluated.
+- `question` (str): The question for which the answers are being evaluated.
+
+**Returns**
+
+- `dictionary`: A dictionary containing gold answers and the candidate answer's matching score.
+
+#### 3. `evaluate`
+
+Returns True if the candidate answer is a match of any of the gold answers.
+
+**Parameters**
+
+- `reference_answer` (list of str): A list of gold (correct) answers to the question.
+- `candidate_answer` (str): The answer provided by a candidate that needs to be evaluated.
+- `question` (str): The question for which the answers are being evaluated.
+
+**Returns**
+
+- `boolean`: A boolean True/False signifying matches between reference or candidate answers.
+
+
 ```python
 from qa_metrics.pedant import PEDANT
 
@@ -145,6 +165,77 @@ print(pedant.get_score(reference_answer[1], candidate_answer, question))
 '''
 ```
 
+## Transformer Neural Evaluation
+Our fine-tuned BERT model is on 🤗 [Huggingface](https://huggingface.co/Zongxia/answer_equivalence_bert?text=The+goal+of+life+is+%5BMASK%5D.). Our Package also supports downloading and matching directly. [distilroberta](https://huggingface.co/Zongxia/answer_equivalence_distilroberta), [distilbert](https://huggingface.co/Zongxia/answer_equivalence_distilbert), [roberta](https://huggingface.co/Zongxia/answer_equivalence_roberta), and [roberta-large](https://huggingface.co/Zongxia/answer_equivalence_roberta-large) are also supported now! 🔥🔥🔥
+
+#### `transformer_match`
+
+Returns True if the candidate answer is a match of any of the gold answers.
+
+**Parameters**
+
+- `reference_answer` (list of str): A list of gold (correct) answers to the question.
+- `candidate_answer` (str): The answer provided by a candidate that needs to be evaluated.
+- `question` (str): The question for which the answers are being evaluated.
+
+**Returns**
+
+- `boolean`: A boolean True/False signifying matches between reference or candidate answers.
+
+```python
+from qa_metrics.transformerMatcher import TransformerMatcher
+
+question = "Which movie is loosley based off the Brother Grimm's Iron Henry?"
+# Supported models: roberta-large, roberta, bert, distilbert, distilroberta
+tm = TransformerMatcher("roberta-large")
+scores = tm.get_scores(reference_answer, candidate_answer, question)
+match_result = tm.transformer_match(reference_answer, candidate_answer, question)
+print("Score: %s; bert Match: %s" % (scores, match_result))
+'''
+Score: {'The Frog Prince': {'The movie "The Princess and the Frog" is loosely based off the Brother Grimm\'s "Iron Henry"': 0.6934309}, 'The Princess and the Frog': {'The movie "The Princess and the Frog" is loosely based off the Brother Grimm\'s "Iron Henry"': 0.7400551}}; TM Match: True
+'''
+```
+
+## Prompting LLM For Evaluation
+
+Note: The prompting function can be used for any prompting purposes.
+
+###### OpenAI
+```python
+from qa_metrics.prompt_llm import CloseLLM
+model = CloseLLM()
+model.set_openai_api_key(YOUR_OPENAI_KEY)
+prompt = 'question: What is the Capital of France?\nreference: Paris\ncandidate: The capital is Paris\nIs the candidate answer correct based on the question and reference answer? Please only output correct or incorrect.'
+model.prompt_gpt(prompt=prompt, model_engine='gpt-3.5-turbo', temperature=0.1, max_tokens=10)
+
+'''
+'correct'
+'''
+```
+
+###### Anthropic
+```python
+model = CloseLLM()
+model.set_anthropic_api_key(YOUR_Anthropic_KEY)
+model.prompt_claude(prompt=prompt, model_engine='claude-v1', anthropic_version="2023-06-01", max_tokens_to_sample=100, temperature=0.7)
+
+'''
+'correct'
+'''
+```
+
+###### deepinfra (See below for descriptions of more models)
+```python
+from qa_metrics.prompt_open_llm import OpenLLM
+model = OpenLLM()
+model.set_deepinfra_key(YOUR_DEEPINFRA_KEY)
+model.prompt(message=prompt, model_engine='mistralai/Mixtral-8x7B-Instruct-v0.1', temperature=0.1, max_tokens=10)
+
+'''
+'correct'
+'''
+```
+
 If you find this repo avialable, please cite our paper:
 ```bibtex
 @misc{li2024panda,