Deleting the same column in different matrices

Hello everyone,

i' ve got the following problem. I have a matrix A with 256x7690 where a lot of columns containing just NaN's. For that reason I want to delete these columns as a first step. In a second step it should further delete the same column number in some other matrices (which have the same number of columns). So for example the 4th and the 29th column contain all NaN's it should delete these two columns and delete the same columns in Matrices B,C,D and E. Note, that I have about 3500 columns which contains all NaN's.

Thanks in Advance.

Answer 1

[KSSV]

You can remove 4th column from a matrix A using

A(:,4) = [] ;

Similarly for other matrices...To get the position of NaN's use isnan.

[Jan]

And explicitly:

Index = all(isnan(A, 1));  % Find columns which are all NaN
A(:, Index) = [];
B(:, Index) = [];
C(:, Index) = [];
...

[Sascha Winter]

Thanks, for that i was searching for.