Matlab doesn't recognise sigshift

Hey guys!

For some reason MATLAB doesn't recognise sigshift, sigadd and sigfold. Is there a reason why? Any help would be great! This is my code so far.

Thank you!

Annabell

x = [3, 11, 7, 0, -1, 4, 2]; 
nx=[-3:3]; 
[y,ny] = sigshift(x,nx,2); 
w = randn(1,length(y)); nw = ny; 
[y,ny] = sigadd(y,ny,w,nw); 
[x,nx] = sigfold(x,nx);
[rxy,nrxy] = conv_m(y,ny,x,nx); 

Answer 1

[Star Strider]

See: Undefined function or variable 'sigshift'. how can i shift the signal?

[Annabell Bennett]

Is there a specific example that I can use?

[Walter Roberson]

You can copy the code for sigshift from https://www.mathworks.com/matlabcentral/fileexchange/2189-digital-signal-processing-using-matlab

But then sigadd() and sigfold() will be undefined, so the easiest thing to do is to install that File Exchange contribution.