How to sort the column of matrix according to amount of NaN for each column?

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In simple case, I have the matrix like this:
NaN 1 4 6 NaN
9 NaN 6 1 2
NaN 3 2 8 3
7 NaN 1 9 3
7 1 8 2 4
and from the matrix we can see the amount of the NaNs: column 1= 2, column 2= 2, column 3= 0, column 4= 0, column 5= 1,
so i want to sort the columns in the matrix according to their NaNs and become like this:
4 6 NaN NaN 1
6 1 2 9 NaN
2 8 3 NaN 3
1 9 3 7 NaN
8 2 4 7 1
May somebody help me with the code? Thanks before :')

Risposta accettata

Rick Rosson
Rick Rosson il 21 Apr 2012
n = sum(isnan(A));
  1 Commento
Isti
Isti il 21 Apr 2012
Thanks for this helping answer. it's produce the amount of the NaN from each column.
And i still have the problem with exchange the column according to that amount.
Is there any code to sort the columns?

Accedi per commentare.

Più risposte (1)

Rick Rosson
Rick Rosson il 21 Apr 2012
n = sum(isnan(A));
B = transpose([ n ; A ]);
C = sortrows(B);
R = transpose(C(:,2:end));

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