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/*
* iemmatrix
*
* objects for manipulating simple matrices
* mostly refering to matlab/octave matrix functions
* this functions depends on the GNU scientific library
*
* Copyright (c) 2009, Franz Zotter
* IEM, Graz, Austria
*
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
*
*/
#include "iemmatrix.h"
#include <stdlib.h>
#ifdef HAVE_LIBGSL
#include <gsl/gsl_linalg.h>
#endif
static t_class *mtx_svd_class;
typedef struct _MTXSvd_ MTXSvd;
struct _MTXSvd_
{
t_object x_obj;
#ifdef HAVE_LIBGSL
gsl_matrix *u;
gsl_vector *s;
gsl_matrix *v;
gsl_vector *w;
#endif
t_outlet *list_u_out;
t_outlet *list_s_out;
t_outlet *list_v_out;
t_atom *list_u;
t_atom *list_s;
t_atom *list_v;
int rows;
int columns;
};
#ifdef HAVE_LIBGSL
static void allocMTXusvw (MTXSvd *x)
{
x->u=(gsl_matrix*)gsl_matrix_alloc(x->rows,x->columns);
x->s=(gsl_vector*)gsl_vector_alloc(x->columns);
x->v=(gsl_matrix*)gsl_matrix_alloc(x->columns,x->columns);
x->w=(gsl_vector*)gsl_vector_alloc(x->columns);
x->list_u=(t_atom*)calloc(sizeof(t_atom),x->rows*x->columns+2);
x->list_s=(t_atom*)calloc(sizeof(t_atom),x->columns);
x->list_v=(t_atom*)calloc(sizeof(t_atom),x->columns*x->columns+2);
}
static void deleteMTXusvw (MTXSvd *x)
{
if (x->list_u!=0)
free(x->list_u);
if (x->list_s!=0)
free(x->list_s);
if (x->list_v!=0)
free(x->list_v);
x->list_u = x->list_s = x->list_v = 0;
if (x->u!=0)
gsl_matrix_free(x->u);
if (x->s!=0)
gsl_vector_free(x->s);
if (x->v!=0)
gsl_matrix_free(x->v);
if (x->w!=0)
gsl_vector_free(x->w);
x->u = 0;
x->s = 0;
x->v = 0;
x->w = 0;
}
#endif
static void deleteMTXSvd (MTXSvd *x)
{
#ifdef HAVE_LIBGSL
deleteMTXusvw(x);
#endif
}
static void *newMTXSvd (t_symbol *s, int argc, t_atom *argv)
{
MTXSvd *x = (MTXSvd *) pd_new (mtx_svd_class);
x->list_u_out = outlet_new (&x->x_obj, gensym("matrix"));
x->list_s_out = outlet_new (&x->x_obj, gensym("list"));
x->list_v_out = outlet_new (&x->x_obj, gensym("matrix"));
x->list_u = 0;
x->list_s = 0;
x->list_v = 0;
#ifdef HAVE_LIBGSL
x->u=0;
x->s=0;
x->v=0;
x->w=0;
#endif
return ((void *) x);
}
static void mTXSvdBang (MTXSvd *x)
{
if (x->list_u) {
outlet_anything(x->list_v_out, gensym("matrix"), x->columns*x->columns+2, x->list_v);
outlet_anything(x->list_s_out, gensym("list"), x->columns, x->list_s);
outlet_anything(x->list_u_out, gensym("matrix"), x->rows*x->columns+2, x->list_u);
}
}
static void mTXSvdMatrix (MTXSvd *x, t_symbol *s,
int argc, t_atom *argv)
{
int rows = atom_getint (argv++);
int columns = atom_getint (argv++);
int size = rows * columns;
int in_size = argc-2;
int n;
#ifdef HAVE_LIBGSL
/* size check */
if (!size)
post("mtx_svd: invalid dimensions");
else if (in_size<size)
post("mtx_svd: sparse matrix not yet supported: use \"mtx_check\"");
else if (rows<columns)
post("mtx_svd: gsl_linalg_SVD_decomp does not support M<N");
else {
x->rows=rows;
x->columns=columns;
deleteMTXusvw(x);
allocMTXusvw(x);
for (n=0;n<in_size;n++)
x->u->data[n]=(double) atom_getfloat(argv++);
gsl_linalg_SV_decomp(x->u,x->v,x->s,x->w);
SETFLOAT((x->list_u),(float) x->rows);
SETFLOAT((x->list_u+1),(float) x->columns);
for (n=0;n<in_size;n++)
SETFLOAT((x->list_u+2+n), (float) x->u->data[n]);
for (n=0;n<x->columns;n++)
SETFLOAT((x->list_s+n),(float) x->s->data[n]);
SETFLOAT((x->list_v),(float) x->columns);
SETFLOAT((x->list_v+1),(float) x->columns);
in_size=x->columns*x->columns;
for (n=0;n<in_size;n++)
SETFLOAT((x->list_v+n+2), (float) x->v->data[n]);
mTXSvdBang(x);
}
#else
post("mtx_svd: implementation requires gsl");
#endif
}
void mtx_svd_setup (void)
{
mtx_svd_class = class_new
(gensym("mtx_svd"),
(t_newmethod) newMTXSvd,
(t_method) deleteMTXSvd,
sizeof (MTXSvd),
CLASS_DEFAULT, A_GIMME, 0);
class_addbang (mtx_svd_class, (t_method) mTXSvdBang);
class_addmethod (mtx_svd_class, (t_method) mTXSvdMatrix, gensym("matrix"), A_GIMME,0);
}
void iemtx_svd_setup(void){
mtx_svd_setup();
}
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