how to sort the elements of 2D matrix and understand their initial column and rows of each elements?

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?

Answer 1

[Stephen23]

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

Answer 2

[Alexander Venus]

this can also be accomplished more intuitive by using ind2sub:

>> a = [7,10,6;8,6,11]

a =

     7    10     6
     8     6    11

>> [b,idx] = sort(a(:));
>> b

b =

     6
     6
     7
     8
    10
    11

>> [i, j] = ind2sub(size(a), idx)

i =

     2
     1
     1
     2
     1
     2


j =

     2
     3
     1
     1
     2
     3