sci2c arduino updated

1 files changed, 72 insertions, 0 deletions

diff --git a/2.3-1/src/c/matrixOperations/norm/snorma.c b/2.3-1/src/c/matrixOperations/norm/snorma.c
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+ /* Copyright (C) 2016 - IIT Bombay - FOSSEE
+
+ 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
+ Author: Siddhesh Wani
+ Organization: FOSSEE, IIT Bombay
+ Email: toolbox@scilab.in
+ */
+
+ /*This function calculates norms for matrices*/
+ /*Acceptable norms are: 1, 2, 'inf', 'fro', */
+
+#include "norm.h"
+#include <math.h>
+
+float dnorma (float *in, int row, int col, int norm)
+{
+	float res = 0, sum = 0;
+	int col_count, row_count;
+
+	switch (norm)
+	{
+		case 1:  /*largest column sum*/
+			for(col_count = 0; col_count < col; col_count++)
+			{
+				sum = 0;
+				for(row_count = 0; row_count < row; row_count++)
+				{
+					sum += in[col_count*row+row_count];
+				}
+				if (sum >= res) 
+				 	res = sum;
+			}
+			break;
+
+		case 2:  /*Largest singular value of the matrix*/
+			break;
+
+		case 3: /*inf: largest row sum*/
+			
+			for(row_count = 0; row_count < row; row_count++)
+			{
+				sum = 0;
+				for(col_count = 0; col_count < col; col_count++)
+				{
+					sum += in[col_count*row + row_count];
+				}
+				if(sum >= res) 
+					res = sum;
+			}
+			break;	
+
+		case 4: /*Frobenius norm*/
+			
+			for(row_count = 0; row_count < row; row_count++)
+			{
+				for(col_count = 0; col_count < col; col_count++)
+				{
+					sum += in[col_count*row + row_count] * in[col_count*row + row_count];
+				}
+			}
+			res = sqrt(sum);
+
+			break;	
+	}
+
+
+	return res;
+}
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