From 8b44229ef44f0558ce045e46ff833fb44df913c9 Mon Sep 17 00:00:00 2001
From: jofret
Date: Mon, 21 Jun 2010 06:24:38 +0000
Subject: Tagging the 2.0 release of scilab2c

---
 src/c/matrixOperations/powm/spowma.c | 72 ++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 src/c/matrixOperations/powm/spowma.c

(limited to 'src/c/matrixOperations/powm/spowma.c')

diff --git a/src/c/matrixOperations/powm/spowma.c b/src/c/matrixOperations/powm/spowma.c
new file mode 100644
index 00000000..b416656a
--- /dev/null
+++ b/src/c/matrixOperations/powm/spowma.c
@@ -0,0 +1,72 @@
+/*
+ *  Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
+ *  Copyright (C) 2008 - INRIA - Arnaud TORSET
+ *
+ *  This file must be used under the terms of the CeCILL.
+ *  This source file is licensed as described in the file COPYING, which
+ *  you should have received as part of this distribution.  The terms
+ *  are also available at
+ *  http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
+ *
+ */
+
+#include <stdlib.h>
+#include "matrixPow.h"
+#include "spec.h"
+#include "pow.h"
+#include "matrixTranspose.h"
+#include "conj.h"
+#include "zeros.h"
+#include "matrixInversion.h"
+#include "matrixMultiplication.h"
+
+void spowma(float* in, int rows, float power, float* out){
+	int i=0, j=0;
+	int symmetric=0;
+	floatComplex *eigenvalues,*eigenvectors,*tmp;
+	float* ZEROS;
+	
+	/* Data initialization */
+	eigenvalues = (floatComplex*)malloc((unsigned int)(rows*rows)*sizeof(floatComplex));
+	eigenvectors = (floatComplex*)malloc((unsigned int)(rows*rows)*sizeof(floatComplex));
+	tmp = (floatComplex*)malloc((unsigned int)(rows*rows)*sizeof(floatComplex));
+	ZEROS = (float*)malloc((unsigned int)(rows*rows)*sizeof(float));
+	
+	/* symmetric test*/
+	for(i=0;i<rows;i++) {
+		for (j=0;j<rows;j++)
+			if (in[i*rows+j]!=in[j*rows+i]) break;
+		
+		if (j!=rows) break;
+	}
+	
+	if ((i==rows)&&(j==rows)) symmetric=1;
+	
+	szerosa(ZEROS,rows,rows);
+	tmp = FloatComplexMatrix(in,ZEROS,rows*rows);
+	
+	/* find eigenvalues and eigenvectors */
+	cspec2a(tmp, rows, eigenvalues,eigenvectors);
+	
+	/* make operation on eigenvalues and eigenvectors */
+	for (i=0;i<rows;i++)
+			eigenvalues[i+i*rows]=cpows(eigenvalues[i+i*rows],FloatComplex(power,0));
+			
+	cmulma(eigenvectors, rows, rows, eigenvalues, rows, rows, tmp);
+	
+	if (symmetric){		
+		ctransposea(eigenvectors, rows,rows, eigenvalues);
+		cconja(eigenvalues, rows*rows, eigenvalues);
+	}
+	else cinverma(eigenvectors, eigenvalues, rows);
+	
+	cmulma(tmp, rows, rows, eigenvalues, rows, rows, eigenvectors);
+	
+	for (i=0;i<rows*rows;i++) out[i]=creals(eigenvectors[i]);
+	
+	
+	free(eigenvalues);
+	free(eigenvectors);
+	free(tmp);
+	
+}
-- 
cgit