Re: [R] assign

[Peter Wolf]

Perez Martin, Agustin wrote:

DeaR useRs:

I would like to assign a values in an object using a loop 'for'.
This is a reduce example of my problem, my real problem is a few
complicated:
for (j in 1:10) {
        x.j<-rnorm(100)
}
I want to create 10 objects as "x.1, x.2, ... , x.9, x.10" with values in
it.
I used the "assign" function but nothing happens.
Thank you very much
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Use eval or assign:

> for(j in 1:10) eval(parse(text=paste("x",j,"<-",j,sep="")))
> x1
[1] 1
> x8
[1] 8
> for(j in 1:10) eval(parse(text=paste("x",j,"<-rnorm(10)",sep="")))
> x1
[1]  0.49045324  0.44842510 -1.18015351 -0.04325187 -0.75345939 -0.99181309
[7]  0.62517301 -0.68466635  0.33383560 -0.62189500
> x2
[1] -0.4344948  2.0276137  1.2783173  1.1170551  0.3546490 -0.0748969
[7] -0.8817247 -1.4649175 -1.5461995 -0.6575016
> for(j in 1:10) assign(paste("y",j,sep=""),rnorm(10))
> y1
[1] 1.7255925 0.4993323 1.8846513 0.2058971 0.2284036  -3.1971553
[7]  -0.2629365 0.2724788  -0.9911388  -0.6341857
> y2
[1] 0.11301503  -1.28497666 0.40670853 0.08479014 1.05818411  -1.10843908
[7] 1.30441911  -0.49050833  -1.21438645 0.03923849
ls()
[1] "j"   "x1"  "x10" "x2"  "x3"  "x4"  "x5"  "x6"  "x7"  "x8"  "x9"  "y1"
[13] "y10" "y2"  "y3"  "y4"  "y5"  "y6"  "y7"  "y8"  "y9"
pw

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