AP-SCE/Mex/a611.cpp

41 lines
752 B
C++

#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;
}