josemanuelgp / word2vec_vector-translation-java Goto Github PK

Dear josemanuelgp

I found your code really useful. However I have a question about the part where you calculate the translation matrix:

Instead of doing WX=Z -> W=transpose(pinv(X)Z)

DoubleMatrix pinverse_matrix = Solve.pinv(matrix_train_source);
DoubleMatrix translationMatrix = pinverse_matrix.mmul(matrix_train_target).transpose();

Why not directly do this: WX=Z -> W=Z pinv(X)

DoubleMatrix pinverse_matrix = Solve.pinv(matrix_train_source);
DoubleMatrix translationMatrix = matrix_train_target.mmul(pinverse_matrix);

I'm sure that I'm missing something, for that reason I ask you.

Cheers