Esempi in C++ (Cpp) per FastSigmoid

Esempio n. 1

File: line.cpp Progetto: SharonTancy/LINE

/* Update embeddings */
void Update(real *vec_u, real *vec_v, real *vec_error, int label)
{
	real x = 0, g;
	for (int c = 0; c != dim; c++) x += vec_u[c] * vec_v[c];
	g = (label - FastSigmoid(x)) * rho;
	for (int c = 0; c != dim; c++) vec_error[c] += g * vec_v[c];
	for (int c = 0; c != dim; c++) vec_v[c] += g * vec_u[c];
}

Esempio n. 2

File: line.cpp Progetto: chentingpc/LINE

/* Update embeddings & return likelihood */
real Update(real *vec_u, real *vec_v, real *vec_error, int label)
{
  real x = 0, f, g;
  for (int c = 0; c != dim; c++) x += vec_u[c] * vec_v[c];
  f = FastSigmoid(x);
  g = (label - f) * rho;
  for (int c = 0; c != dim; c++) vec_error[c] += g * vec_v[c];
  for (int c = 0; c != dim; c++) vec_v[c] += g * vec_u[c];

  return label > 0? fast_log(f+LOG_MIN): fast_log(1-f+LOG_MIN);
}