Can anyone help : rank each row of a matrix

Hi all, If I have a matrix like

A=
 0.2  NaN  0.8  0.8
-0.2  1  0.3  0.2
0.2  -0.3  0.2  2
0.7  -0.1  -0.4  0.7
NaN  0.2  NaN  0.9

How do I get a resulting matrix B which ranks each row of A and the result shows like this ... Please Pay attention to row 3. I am looking for a complete answer for this as I am new in Matlab. Thank you a lot !

B=
1  NaN  2  2
1  4  3  2
2  1  2  4
3  2  1  3
NaN  1  NaN  2

[Jan]

You forgot to mention the definition of "ranking". There is an infinite number of possible methods to obtain B based on A.

[Stephen23]

Do not post duplicate questions:

http://www.mathworks.com/matlabcentral/answers/266651-rank-the-values-in-each-row

You can simply add a comment to your original question.

Answer 1

[Jan]

A guess:

A = [0.2  NaN  0.8  0.8; ...
  -0.2  1  0.3  0.2; ...
  0.2  -0.3  0.2  2; ...
  0.7  -0.1  -0.4  0.7; ...
  NaN  0.2  NaN  0.9];
B = nan(size(A));
for k = 1:size(A, 1)
  valid   = isfinite(A(k, :));
  Ak      = A(k, valid);
  [~, ~, iC] = unique(Ak, 'sorted');  % [EDITED, 3rd instead of 2nd output]
  B(k, valid) = Ak(iC);
end

[Qian cao]

Hi, thx. But your function does not work it out...:(

[Jan]

@Qian cao: Please explain this with any details. Do you get an error message? Are you able to idenitfy the error and fix it by your own?

Did you see, that I asked you for a definition of "ranking"? So please give us a chance to answer efficiently without guessing, what you want and observe.

[Jan]

@Qian cao: What a pitty that you do not answer my question for clarification. Nevertheless, I've edited my answer. Perhaps it is "working" now.