Added support for cumprod, cumsum, triu, tril functions

1 files changed, 34 insertions, 0 deletions

diff --git a/src/c/matrixOperations/tril/i8trila.c b/src/c/matrixOperations/tril/i8trila.c
new file mode 100644
index 0000000..a91594a
--- /dev/null
+++ b/src/c/matrixOperations/tril/i8trila.c
@@ -0,0 +1,34 @@
+// 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
+
+//Function to extract lower triagular entries from given matrix
+
+#include "triu.h"
+
+void i8trila (int8 *in, int row, int column, double diag, int8 *out)
+{
+	int row_counter, col_counter = 0;
+
+	for(row_counter=0; row_counter < row; row_counter++)
+	{
+		for(col_counter=0; col_counter < column; col_counter++)
+		{
+			if((double)(row_counter + diag) >= (double)col_counter)
+			{
+				out[col_counter*row+row_counter] = in[col_counter*row+row_counter];
+			}
+			else
+			{
+				out[col_counter*row+row_counter] = 0;	
+			}
+		}
+	}
+}
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