[R] matrix filtering and reordering

Peter Alspach PAlspach at hortresearch.co.nz
Wed Apr 8 00:07:38 CEST 2009


Kia ora Juan

?merge

HTH ....

Peter Alspach 

> -----Original Message-----
> From: r-help-bounces at r-project.org 
> [mailto:r-help-bounces at r-project.org] On Behalf Of Juan Pablo Fededa
> Sent: Wednesday, 8 April 2009 8:55 a.m.
> To: r-help at r-project.org
> Subject: [R] matrix filtering and reordering
> 
> I have two matrixes,
> 
> red:
> 
> a 123
> c 200
> d 400
> e 650
> g 127
> f 100
> 
> and blue:
> 
> a 10
> b 20
> c 30
> d 40
> e 50
> f 60
> g 70
> 
> is there any easy way to get the next matrix:
> 
> a 10 123
> b 20 0
> c 30 200
> d 40 400
> e 50 650
> f 60 100
> g 70 127
> 
> i.e. to add in the third column of blue the [,2] values of 
> red corresponding to the file with same [x,1] value of blue, 
> adding a cero in the case that there is no [x,1] 
> corresponding value in the red matrixes (case for row 2 of blue).
> Thanks in advance,
> 
> 
> juan
> 
> 
> 
> Juan Pablo Fededa
> 
> 	[[alternative HTML version deleted]]
> 
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> 

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