Integrating Indices

Hello,

I have taken the matrix below and sorted it ascending by row:

(Original) A=[1 4 5; 3 -1 8; 12 7 9; 4 10 -5];

(Sorted By Row) B=[1 4 5; -1 3 8; 7 9 12; -5 4 10];

I would like to have the indices of the original matrix appear in the locations of the sorted matrix. For this case it would look like this.

(Original) A=[1 2 3; 1 2 3; 1 2 3; 1 2 3];

(Sorted By Row) B=[1 2 3; 2 1 3; 2 3 1; 3 1 2];

I have tried several different methods but with no luck. Any assistance is appreciated

Thanks

[zohar]

Hi Daniel

Give us some code and use the code formatting.

Answer 1

[Walter Roberson]

[sorted_A, sort_indexes] = sort(A,2);

[Daniel]

Thank you, it still isn't quite what I need.I may have worded the question wrong.

[Oleg Komarov]

All of your examples are solved with Walter's solution!

Answer 2

[Daniel]

A=[ 4 3; 8 4;-1 -5; 2 7];
A1=A
[m,n]=size(A);
for o=1:n
A1=A;
min_val=A(1);
  for i=1:n-1
      for j=1:m
          if A(j,i)>A(j,i+1);
              A(j,i+1)=A(j,i);
              A(j,i)=A1(j,i+1);
          end
      end
  end
end
A
comp=isreal(A)        
if  comp==0                
  A2=abs(A);
else
  A2=A;   
end

This is what I currently have. The first for loops sort the matrix by row. The second section ensures a real answer.

[Oleg Komarov]

Have you tried Walter's solution?

Answer 3

[Daniel]

Yes I have tried Walter's solution. When added to my code it yeilds the following.

sort_indexes =

       1     2
       1     2
       1     2
       1     2

For these two matrices, it should read:

sort_indexes =

       2     1
       2     1
       2     1
       1     2

this is much closer to what I need, but if it worked properly it would display the indexes of the first matrix in the positions in the second matrix. Is there any way to obtain this solution?

[Oleg Komarov]

A=[ 4 3; 8 4;-1 -5; 2 7];

[sorted_A, sort_indexes] = sort(A,2)

gives exactly the second matrix...

[Daniel]

I apologize, something was wrong with the way that I had input this solution. Both you and Walter are Correct.

Thank you