Functions for computing the ZV matrix product. More...

#include "gensvm_zv.h"

Include dependency graph for gensvm_zv.c:

Functions
void	gensvm_calculate_ZV (struct GenModel model, struct GenData data, double *ZV)
	Wrapper around sparse/dense versions of this function. More...

void	gensvm_calculate_ZV_sparse (struct GenModel model, struct GenData data, double *ZV)
	Compute the product Z*V for when Z is a sparse matrix. More...

void	gensvm_calculate_ZV_dense (struct GenModel model, struct GenData data, double *ZV)
	Compute the product Z*V for when Z is a dense matrix. More...

Detailed Description

Functions for computing the ZV matrix product.

Author: G.J.J. van den Burg

Date: 2016-10-17

This file exists because the product Z*V of two matrices occurs both in the computation of the loss function and for predicting class labels. Moreover, a distinction has to be made between dense Z matrices and sparse Z matrices, hence a seperate file is warranted.

Copyright: Copyright 2016, G.J.J. van den Burg.

This file is part of GenSVM.

GenSVM is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

GenSVM is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with GenSVM. If not, see http://www.gnu.org/licenses/.

Definition in file gensvm_zv.c.

Function Documentation

◆ gensvm_calculate_ZV()

void gensvm_calculate_ZV	(	struct GenModel *	model,
		struct GenData *	data,
		double *	ZV
	)

Wrapper around sparse/dense versions of this function.

This function tests if the data is stored in dense format or sparse format by testing if GenData::Z is NULL or not, and calls the corresponding version of this function accordingly.

See also: gensvm_calculate_ZV_dense(), gensvm_calculate_ZV_sparse()

Parameters

[in]	model	a GenModel instance holding the model
[in]	data	a GenData instance with the data
[out]	ZV	a pre-allocated matrix of appropriate dimensions

Definition at line 50 of file gensvm_zv.c.

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◆ gensvm_calculate_ZV_dense()

void gensvm_calculate_ZV_dense	(	struct GenModel *	model,
		struct GenData *	data,
		double *	ZV
	)

Compute the product Z*V for when Z is a dense matrix.

This function uses cblas_dgemm() to compute the matrix product between Z and V.

Parameters

[in]	model	a GenModel instance holding the model
[in]	data	a GenData instance with the data
[out]	ZV	a pre-allocated matrix of appropriate dimensions

Definition at line 108 of file gensvm_zv.c.

◆ gensvm_calculate_ZV_sparse()

void gensvm_calculate_ZV_sparse	(	struct GenModel *	model,
		struct GenData *	data,
		double *	ZV
	)

Compute the product Z*V for when Z is a sparse matrix.

This is a simple sparse-dense matrix multiplication, which uses cblas_daxpy() for each nonzero element of Z, to compute Z*V.

Parameters

[in]	model	a GenModel instance holding the model
[in]	data	a GenData instance with the data
[out]	ZV	a pre-allocated matrix of appropriate dimensions

Definition at line 70 of file gensvm_zv.c.