Replacing a value with nan

Hello all. I want to replace a value that I have in accuracyC with nan if its counterpart value is nan in RTc. RTc and accuracyC are two matrices. I have written this loop but it does not work. I appreciate your help.

         h=0;
         for i=1:size(accuracyC,1)     
             for j=1:size(accuracyC,2)          
                  if RTc(i,j)==nan
                    accuracyC(i,j)=NaN;
                    h=h+1;
                end        
            end
         end

Answer 1

[Star Strider]

Try this:

RTc = [1 2 3 NaN; 4 5 6 7; NaN 8 9 10]                      % Create Matrix
AccuracyC = randi(9, size(RTc))                             % Create Matrix

AccuracyC(isnan(RTc)) = NaN                                 % Desired Result

RTc =

       1     2     3   NaN
       4     5     6     7
     NaN     8     9    10

AccuracyC =

       7     1     6     6
       8     3     9     3
       1     8     2     1

AccuracyC =

       7     1     6   NaN
       8     3     9     3
     NaN     8     2     1

Answer 2

[Dennis]

I read about this lately, NaN never equals NaN (some IEEE stuff).

But you can use isnan instead.