[R] removing invariant columns from a matrix

[Peter Dalgaard]

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

> It works great, except that in the case where only one column is left,
> it returns a vector and the column name is lost. How can you avoid that
> behavior?

Just add drop=FALSE to the indexing i.e. A[,cond,drop=FALSE] 


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