[R] binding rows from different matrices

Peter Dalgaard p.dalgaard at biostat.ku.dk
Tue Jun 29 17:58:32 CEST 2004

Prof Brian Ripley <ripley at stats.ox.ac.uk> writes:

> You can almost always index in such problems: here is one way.
> rbind(veca,vecb,vecc)[matrix(1:15, 3, byrow=T), ]
> Take it apart of see how it works, if it is not immediately obvious.

Or, a little longer, but perhaps more intuitive:


I.e., convert to array, do generalized transpose, convert back to
matrix. Not that I got the index calculations right on first try....

   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907

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