Unrecognized function or variable

code :

edge_img = zeros(size(img));
edge_img(edges(1,:) + size(img,1)*[0:size(img,2)-1]) = 1;
edge_img(edges(2,:) + size(img,1)*[0:size(img,2)-1]) = 1;

error shown:

Unrecognized function or variable 'edges'.

Error in linebyline (line 16)

edge_img(edges(1,:) + size(img,1)*[0:size(img,2)-1]) = 1;

kindly help me to remove this issue.

Answer 1

[madhan ravi]

edges not defined