Hello,
What do you want to sample? Rows? With or without replacement? You
need to give us more information on what you want.
Start by seeing the help page for ?sample
Hope this helps,
Rui Barradas
Citando MARYAM <firoozi_maryam6...@yahoo.com>:
> Dear mr/madam
> I have 3 matrix with 20 rows and 3 columns like this: I want to
> sample randomly from three matrix and put it in a vector.How can i
> do that?
>
> Young.list1<- matrix(NA,nrow= 20,ncol=3)
> Young.list1[,1]<- 1:20
> Young.list1[,2]<- 0.6
> Young.list1[,3]<- 500
> colnames(Young.list1)<- c("ID","r","EBV")
> ###########################################
> Young.list2<- matrix(NA,nrow= 20,ncol=3)
> Young.list2[,1]<- 21:40
> Young.list2[,2]<- 0.7
> Young.list2[,3]<- 600
> colnames(Young.list2)<- c("ID","r","EBV")
> ###########################################
> Young.list3<- matrix(NA,nrow= 20,ncol=3)
> Young.list3[,1]<- 41:60
> Young.list3[,2]<- 0.8
> Young.list3[,3]<- 700
> colnames(Young.list3)<- c("ID","r","EBV")
> [[alternative HTML version deleted]]
>
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> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.htmland provide commented,
> minimal, self-contained, reproducible code.
[[alternative HTML version deleted]]
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
