hi,
during a for(i in 1:xx]) loop I always newly calculate a vector
(e.g. tmp<-c(a,b,c,d,e) )
now i need that vector to be attached at the bootom of a matrix (or
data.frame).
e.g.
m<-matrix()
for(i in 1:5]){
#some calculations for a,b,c,d,e
a<- ... b<- ... c<- .. ....
tmp<-c(a,b,c,d,e)
??? now I need to attach this tmp to the matrix m ???
}
i couldn't get rbind or append to work properly
thanks for advice,
jan
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use list and do.call:
MyList <- list()
for(i in 1:5]){
#some calculations for a,b,c,d,e
a<- ... b<- ... c<- .. ....
MyList[[i]] <- c(a,b,c,d,e)
}
MyData <- do.call("rbind", MyList)
will work fro relatively small ( < 1000, say) values of i. Otherwise,
other solutions will be quicker.
Best,
Renaud
Jan Malte Wiener wrote:>
> hi,
>
> during a for(i in 1:xx]) loop I always newly calculate a vector
> (e.g. tmp<-c(a,b,c,d,e) )
> now i need that vector to be attached at the bootom of a matrix (or
> data.frame).
>
> e.g.
>
> m<-matrix()
>
> for(i in 1:5]){
> #some calculations for a,b,c,d,e
> a<- ... b<- ... c<- .. ....
>
> tmp<-c(a,b,c,d,e)
>
> ??? now I need to attach this tmp to the matrix m ???
> }
>
> i couldn't get rbind or append to work properly
>
> thanks for advice,
> jan
>
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> r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
> Send "info", "help", or "[un]subscribe"
> (in the "body", not the subject !) To: r-help-request at
stat.math.ethz.ch
>
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--
Dr Renaud Lancelot, v?t?rinaire
CIRAD, D?partement Elevage et M?decine V?t?rinaire (CIRAD-Emvt)
Programme Productions Animales
http://www.cirad.fr/presentation/programmes/prod-ani.shtml (Fran?ais)
http://www.cirad.fr/presentation/en/program-eng/prod-ani.shtml (English)
ISRA-LNERV tel (221) 832 49 02
BP 2057 Dakar-Hann fax (221) 821 18 79 (CIRAD)
Senegal e-mail renaud.lancelot at cirad.fr
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a brute force solution would be
tmp<-c()
for(i in 1:5]){
#some calculations for a,b,c,d,e
a<- ... b<- ... c<- .. ....
tmp<-c(tmp,c(a,b,c,d,e))}
m<-t(matrix(tmp,5,5))
Jan Malte Wiener wrote:
> hi,
>
> during a for(i in 1:xx]) loop I always newly calculate a vector
> (e.g. tmp<-c(a,b,c,d,e) )
> now i need that vector to be attached at the bootom of a matrix (or
> data.frame).
>
>
> e.g.
>
> m<-matrix()
>
> for(i in 1:5]){
> #some calculations for a,b,c,d,e
> a<- ... b<- ... c<- .. ....
>
> tmp<-c(a,b,c,d,e)
>
> ??? now I need to attach this tmp to the matrix m ???
> }
>
> i couldn't get rbind or append to work properly
>
> thanks for advice,
> jan
>
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
> r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
> Send "info", "help", or "[un]subscribe"
> (in the "body", not the subject !) To: r-help-request at
stat.math.ethz.ch
>
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>
>
>
--
--
Erich Neuwirth, Computer Supported Didactics Working Group
Visit our SunSITE at http://sunsite.univie.ac.at
Phone: +43-1-4277-38624 Fax: +43-1-4277-9386
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