-added 6.1.1 (diff function)

Mex/a611.cpp

@@ -0,0 +1,41 @@
+#include "mex.h" 
+#include "matrix.h"
+#include "stdlib.h"
+
+
+
+void mexFunction(int nlhs, mxArray *plhs[], 			// Output  
+				 int nrhs, const mxArray *prhs[]) 		// Input  
+{
+	
+	int num_data_points = *mxGetPr(prhs[0]);
+	
+	double* x = (double *)mxCalloc(num_data_points, sizeof(double));
+	double* y = (double *)mxCalloc(num_data_points, sizeof(double));
+	double* temp = (double *)mxCalloc(num_data_points, sizeof(double));
+	
+	for(int j=0; j < num_data_points; j++)
+	{
+		x[j] = mxGetPr(prhs[1])[j];
+		y[j] = mxGetPr(prhs[2])[j];
+	}
+	
+//diff
+
+
+	for (int i=0; i < num_data_points; ++i)
+	{
+		temp[i] = y[i+1] - y[i];
+	}
+
+
+// Output
+	nlhs = num_data_points;
+	for(int j=0; j < num_data_points; j++){
+		plhs[j]=mxCreateDoubleScalar(temp[j]);
+	}
+	
+
+		 
+ return;
+}

Mex/a611.m

@@ -0,0 +1,5 @@
+% function accepts 1 double and 2 vectors of double 
+%		a611(#num_of_points, vector_a, vector_b)
+% number of datapoints in both vectors must be equal, 
+% or else the result will not be correct
+%