why is my output does not change ?

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tomer polsky 2018-6-28

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https://ww2.mathworks.cn/matlabcentral/answers/407868-why-is-my-output-does-not-change

评论： tomer polsky 2018-6-28

hello I want to write a code for shifting a signal : so lets suppose I have this signal : x(n) and i want to move it like this x(n-2) so this my main code :

clc; clear all; close all;

x=[2 3 0 -5 2 1]
m=2
n=[-1:4]
k=-1 
%shift signal x(2-k)
[n_y,y] = shift_signal_by_k(x,m,n,k)

and this is my function shift_signal_by_k:

function [n_y,y] = shift_signal_by_k(x,m,n,k)
   if (k<0)
          if(n>0)
          n_y=m+flip(-n)
          disp('n') %%h(m-k)
          y=flip(x);
          elseif(n<0)
          n_y=n-m;
          y=flip(x);
          else(n==0)
           n_y=n
           y=flip(x)
          end
   end
end