how to alter this code ???

if i have A matrix like this

 A = [ 1 0 1 1 1
       0 0 1 0 1
       0 1 0 1 1
       1 1 0 O 0 ]

S = randi([0 1], [size(A), 5]); %Sk is S(:, :, k) , GENERATE 5 RANDOM MATRIX

z = squeeze(sum(sum(bsxfun(@ne, S, A), 1), 2)) %compare A to each page with bsxfun and sum in two dimensions
[zmin, minidx] = min(z) ; %find location of minimum  in z
Smin = S(:, :, minidx);  %and return that page

this code return the matrix which have the MIN value

how to make this code to return the second min value?? like this

 z = 5 2 7 9 1 

 min value is 1 
i want to return the 2 where is the second min value

Answer 1

[Image Analyst]

sorted_z = sort(z, 'descend');
secondMin = sorted_z(2);

[Firas Al-Kharabsheh]

thanks but i want to return the matrix in index 2 in the sorted_z

how can i do this

i try this code but its did not work

sorted_z = sort(z, 'ascend')
secondMin = sorted_z(2)
[z2min , mindx] = secondMin
Smin2 = S(:, :, mindx);

[Image Analyst]

S has just ones and zeros in it while z has other integers. So you will not find the min value of z anywhere in S. Try this though:

A = [ 1 0 1 1 1
  0 0 1 0 1
  0 1 0 1 1
  1 1 0 0 0 ]

S = randi([0 1], [size(A), 5]) %Sk is S(:, :, k) , GENERATE 5 RANDOM MATRIX

z = squeeze(sum(sum(bsxfun(@ne, S, A), 1), 2)) %compare A to each page with bsxfun and sum in two dimensions
sorted_z = sort(z, 'descend')
secondMin = sorted_z(2)
% Find location of second smallest value in z
index = find(z == secondMin)
% Smin = S(:, :, minidx)  %and return that page