Convolution Matlab Code with FFT and IFFT

Matlab has own convolution code; but this code is use the fft and ifft and thanks to Fourier Transform properties make own convolution algorithm.

function y=newconv(x,h)

sizeX=size(x);

if(sizeX(1)>sizeX(2))

    x=x';

end

sizeH=size(h);

if(sizeH(1)>sizeH(2))

    h=h';

end

M=length(x);

N=length(h);

y=zeros(1,M+N-1);

NewLength=M+N-1;

fftx=fft(x,NewLength);

ffth=fft(h,NewLength);

k=fftx.*ffth;

y=ifft(k);

plot(y,'*');hold;

plot(conv(x,h),'red');

legend('newconv','conv')