What, variable y is doing in this program? function [y] = symextend(x,Nnum) y(:,1:Nnum) = fliplr(x(:,1:Nnum)); y = [fliplr(x(:,1:Nnum)) x x(:,end:-1:end-Nnum+1)]; y = [flipud(y(1:Nnum,:)); y ;y(end:-1:​end-Nnum+1​,:)];

What, variable y is doing in this program?

function [y] = symextend(x,Nnum)
  y(:,1:Nnum) = fliplr(x(:,1:Nnum));
  y = [fliplr(x(:,1:Nnum)) x x(:,end:-1:end-Nnum+1)];
  y = [flipud(y(1:Nnum,:)); y ;y(end:-1:end-Nnum+1,:)];

I'm doing project on image processing, kindly give me some suggestions.

Answer 1

[Walter Roberson]

The variable "y" is the output variable. Whatever is written into "y" will be returned from the function.