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b03fd59 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 | /**
* Copyright (c) 2016-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
#include "vector.h"
#include <assert.h>
#include <cmath>
#include <iomanip>
#include "matrix.h"
namespace fasttext {
Vector::Vector(int64_t m) : data_(m) {}
void Vector::zero() {
std::fill(data_.begin(), data_.end(), 0.0);
}
real Vector::norm() const {
real sum = 0;
for (int64_t i = 0; i < size(); i++) {
sum += data_[i] * data_[i];
}
return std::sqrt(sum);
}
void Vector::mul(real a) {
for (int64_t i = 0; i < size(); i++) {
data_[i] *= a;
}
}
void Vector::addVector(const Vector& source) {
assert(size() == source.size());
for (int64_t i = 0; i < size(); i++) {
data_[i] += source.data_[i];
}
}
void Vector::addVector(const Vector& source, real s) {
assert(size() == source.size());
for (int64_t i = 0; i < size(); i++) {
data_[i] += s * source.data_[i];
}
}
void Vector::addRow(const Matrix& A, int64_t i, real a) {
assert(i >= 0);
assert(i < A.size(0));
assert(size() == A.size(1));
A.addRowToVector(*this, i, a);
}
void Vector::addRow(const Matrix& A, int64_t i) {
assert(i >= 0);
assert(i < A.size(0));
assert(size() == A.size(1));
A.addRowToVector(*this, i);
}
void Vector::mul(const Matrix& A, const Vector& vec) {
assert(A.size(0) == size());
assert(A.size(1) == vec.size());
for (int64_t i = 0; i < size(); i++) {
data_[i] = A.dotRow(vec, i);
}
}
int64_t Vector::argmax() {
real max = data_[0];
int64_t argmax = 0;
for (int64_t i = 1; i < size(); i++) {
if (data_[i] > max) {
max = data_[i];
argmax = i;
}
}
return argmax;
}
std::ostream& operator<<(std::ostream& os, const Vector& v) {
os << std::setprecision(5);
for (int64_t j = 0; j < v.size(); j++) {
os << v[j] << ' ';
}
return os;
}
} // namespace fasttext
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