[R] removing invariant columns from a matrix

[Peter Dalgaard]

"Moises Hassan" <mhassan at scitegic.com> writes:

> I'm looking for an efficient way of removing zero-variance columns from
> a large matrix.
> 
> Any suggestions?

A[,apply(A,2,var)>0]

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   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
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