linear convolution by matrix method without using 'conv()'

linear convolution by matrix method without using 'conv()'

linear convolution by matrix method without using 'conv()'
here i have written code for linear linear convolution by matrix method. it takes two vectors and convolve them linearly.
I have made a function named shiftFTN (function code is attached with the main m file in the zip file) to shift the vector to the right by 1.