Hi I am getting error of unexpected matlab operator in line5 and let me know how to solve it??

function [y Ny]=convo2(x,Nx,h,Nh)
Ny=Nx+Nh;
for n=0:Ny
    y(n+1)=0;
    for k+1=1:Nh
    for m+1=1:Nx
        n=k+m;
        y(n+1)=y(n+1)+h(k+1)*x(m+1);
    end
    end
end

[dpb]

Format the code, please...

function [y Ny]=convo2(x,Nx,h,Nh)
  Ny=Nx+Nh; 
  for n=0:Ny 
    y(n+1)=0; 
    for k+1=1:Nh 
      for m+1=1:Nx 
        n=k+m; 
        y(n+1)=y(n+1)+h(k+1)*x(m+1);
      end
    end
  end

Answer 1

[dpb]

...
for k+1=1:Nh 
  for m+1=1:Nx 
    ...

are illegal syntax. If you mean for k and m to start from 2, then write the loop over

for k=2:Nh-1

etc., or recast similarly as to your loop over n

NB: the assignment to y() inside the loop w/o preallocating will be very inefficient.

Answer 2

[Star Strider]

You actually have two problems:

      for k+1=1:Nh
      for m+1=1:Nx

This is not a permitted construction.

Restate them as:

      for k=1:Nh
      for m=1:Nx

and adjust your subscript indices to get the result you want.