MATLAB: How to sort the elements of 2D matrix and understand their initial column and rows of each elements

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I have 20*30 matrix . I want to ascending sort matrix and understand their initial column and rows of each elements. for example a=[7 10 6;8 6 11] then sort b=[6 6 7 8 10 11] ,initial index of 10 is (1 2),…. can any body help me to write matlab code?

Best Answer

Perhaps you want something like this:
>> a = [7,10,6;8,6,11]
a =
     7    10     6
     8     6    11
>> [R,C] = ndgrid(1:size(a,1),1:size(a,2));
>> [b,idx] = sort(a(:));
>> b % sorted values:
b =
     6
     6
     7
     8
    10
    11
>> [R(idx),C(idx)] % initial (R,C) indices of the sorted values
ans =
     2     2
     1     3
     1     1
     2     1
     1     2
     2     3
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