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authorIOhannes m zmölnig <zmoelnig@users.sourceforge.net>2005-05-09 16:27:23 +0000
committerIOhannes m zmölnig <zmoelnig@users.sourceforge.net>2005-05-09 16:27:23 +0000
commitdc15d41e8b4ec760e1ba3378683656c0d29469d8 (patch)
treed683604886568d0c221d32063c6ebf3f0e02ae23 /src/mtx_prod.c
parente1a040030cba3a2272c663af395b9a65c02f4cde (diff)
implemented octave's/matlab's "prod()"-function: multiply cols together
svn path=/trunk/externals/iem/iemmatrix/; revision=2928
Diffstat (limited to 'src/mtx_prod.c')
-rw-r--r--src/mtx_prod.c72
1 files changed, 72 insertions, 0 deletions
diff --git a/src/mtx_prod.c b/src/mtx_prod.c
new file mode 100644
index 0000000..d6c7a15
--- /dev/null
+++ b/src/mtx_prod.c
@@ -0,0 +1,72 @@
+/*
+ * iemmatrix
+ *
+ * objects for manipulating simple matrices
+ * mostly refering to matlab/octave matrix functions
+ *
+ * Copyright (c) IOhannes m zmlnig, forum::fr::umlute
+ * 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"
+
+/* mtx_prod */
+/* prod(diag(A))
+ */
+static t_class *mtx_prod_class;
+static void mtx_prod_matrix(t_matrix *x, t_symbol *s, int argc, t_atom *argv)
+{
+ int row=atom_getfloat(argv++);
+ int col=atom_getfloat(argv++);
+ int n;
+
+ if(row*col>argc-2)post("mtx_prod: sparse matrices not yet supported : use \"mtx_check\"");
+ else {
+ t_atom *ap = (t_atom *)getbytes(col * sizeof(t_atom)), *dummy=ap;
+
+ for(n=0;n<col;n++, dummy++){
+ int i=row;
+ t_float f=1.f;
+ t_atom*ap2=argv+n;
+ while(i--){
+ f*=atom_getfloat(ap2+col*i);
+ }
+ SETFLOAT(dummy, f);
+ }
+
+ outlet_list(x->x_obj.ob_outlet, gensym("prod"), col, ap);
+
+ freebytes(ap, (col * sizeof(t_atom)));
+ }
+}
+static void mtx_prod_list(t_matrix *x, t_symbol *s, int argc, t_atom *argv){
+ t_float f=1.f;
+ while(argc--)f*=atom_getfloat(argv++);
+ outlet_float(x->x_obj.ob_outlet, f);
+}
+
+
+static void *mtx_prod_new()
+{
+ t_matrix *x = (t_matrix *)pd_new(mtx_prod_class);
+ outlet_new(&x->x_obj, 0);
+ x->row = x->col = 0;
+ x->atombuffer = 0;
+
+ return (x);
+}
+void mtx_prod_setup(void)
+{
+ mtx_prod_class = class_new(gensym("mtx_prod"), (t_newmethod)mtx_prod_new,
+ (t_method)matrix_free, sizeof(t_matrix), 0, A_GIMME, 0);
+ class_addlist (mtx_prod_class, mtx_prod_list);
+ // class_addbang (mtx_prod_class, matrix_bang);
+ class_addmethod(mtx_prod_class, (t_method)mtx_prod_matrix, gensym("matrix"), A_GIMME, 0);
+ class_sethelpsymbol(mtx_prod_class, gensym("iemmatrix/mtx_prod"));
+}
+void iemtx_prod_setup(void){
+ void mtx_prod_setup(void);
+}