Removing Nans, converting matrix to vector

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MiauMiau 2016-6-29

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评论： KSSV 2016-6-29

Hi

I have 50 x 60 x 45 double arrays, from which I want to remove the Nans, and, which I then want to convert into a (row or column) vector. I realized that the following line should do this (let C be my array):

C(isnan(C)) = [];

is this correct at all? How comes that with this line the matrix is also converted to a vector? Also, are the linear indices of the original matrix used to create the order of the elements in the row vector?

Many thanks

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Answer 1

KSSV 2016-6-29

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Let C be you matrix of 50X60X45 matrix

C = C(:) ; % convert to column vector 
C(isnan(C)) = [] ;   % remove NaNs

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MiauMiau 2016-6-29

what is the difference to mine? I dont necessarily want a column vector

KSSV 2016-6-29

If you use K(isnan(K)) = []; to a matrix, the output will be always an array. If you want a matrix again, then using find, get the indices of NaN and replace them by your number. Then the output will be a matrix of original size.

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