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#include <stdio.h>
#include "toeplitz.h"
#include "doubleComplex.h"
#include "stdlib.h"
#include "string.h"
#include "cat.h"
/*Function to build a Toeplitz Matrix for inputs of DoubleComplex datatype*/
void ztoeplitza(doubleComplex* inp1,int size1,doubleComplex* inp2,int size2,doubleComplex* oup)
{
if (inp1[0]!=inp2[0])
{
printf("Error!The first elements of the Vectors are not equal."); // First element of both input vectors must be equal for Toeplitz.
return;
}
int i, j;
for(i=0;i<size1*size2;i++) oup[i] = DoubleComplex(0,0); // Initializing the output matrix with zeros.
for (i = 0; i<size1; i++)
{
for (j = 0; j<size2; j++)
{
oup[j*size1] = inp2[j]; // Elements of the second input vector are copied to the first row of the Toeplitx Matrix.
}
oup[i] = inp1[i]; // Elements of the first input vector are copied to the first column of the Toeplitx Matrix.
}
for (i = size2+1; i<size1*size2; i++) // Loop to build the rest of the Toeplitz matrix.
{
if (oup[i] == DoubleComplex(0,0))
oup[i] = oup[i-size2-1];
}
}
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