CODEWITHSUNDEEP
matlabsortingmatrix
user2391917
user2391917

Reputation: 13

Matlab matrix sort

I 've a specific problem of sorting rows in matlab. This is mine example entry matrix:

 A =

 [0 1 1;
  0 1 2;
  1 0 3;
  1 0 4;
  1 1 5;
  0 1 6;]

and this is "sorting vector" 

 V=

  1 
  4 
  6 
  2 
  3 
  5

How to get an output matrix like this: 

B=

 [0 1 1;
  1 0 4;
  0 1 6;
  0 1 2;
  1 0 3;
  1 1 5]

?

First I've added vector V to matrix A (last column) but the next step I don't know how it should look. I'm stuck.

In advance, thanks for your time and help :)

Upvotes: 1

Views: 225

Answers (2)

p8me
p8me

Reputation: 1860

To rearrange or select any desired rows:

B = A(V,:);

The same concept could be used for columns and for rearranging, selecting or repeating any desired row or column:

V2 = [3 1 3];
B2 = A(:,V2);

B2 = 

 1     0     1
 2     0     2
 3     1     3
 4     1     4
 5     1     5
 6     0     6

Learn about colon operator(:) here:

http://www.mathworks.com/help/matlab/ref/colon.html

Upvotes: 3

fnery
fnery

Reputation: 758

This might be the answer:

B = A(V(:),:);

Upvotes: 3

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