ia m trying to zigzagscan lena image am not getting its inverse

i am using this code

https://in.mathworks.com/matlabcentral/fileexchange/15317-zigzag-scan

am not getting the exact inverse

A= imread('lena1.jpg');
in= A(:,:,1);
output_zigzag = zigzag(in);
vmax = size(in, 1);
hmax = size(in, 2);
output_izigzag = uint8(izigzag(in, vmax, hmax));

please help me out in getting the zigzag inverse

[juveria fatima]

oh sorry i got it ,,,i was giving wrong input