> -Original Message-
> From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of Kevin
> E. Thorpe
> Sent: Tuesday, March 31, 2015 10:53 AM
> To: Duncan Murdoch
> Cc: R Help Mailing List
> Subject: Re: [R] Randomly interleaving data frames while preserving
>
samples<-sample(c(rep(1,10),rep(2,10),rep(3,10)),30)
samples[samples==1]<-1001:1010
samples[samples==2]<-2001:2010
samples[samples==3]<-3001:3010
fullDf<-rbind(df1,df2,df3)
fullDf[sort(order(samples),index.return=TRUE)$ix,]
On Tue, 2015-03-31 at 13:05 -0400, Kevin E. Thorpe wrote:
> Hello.
>
>
On 03/31/2015 01:44 PM, Duncan Murdoch wrote:
On 31/03/2015 1:05 PM, Kevin E. Thorpe wrote:
Hello.
I am trying to simulate recruitment in a randomized trial. Suppose I
have three streams (strata) of patients represented by these data frames.
df1 <- data.frame(strat=rep(1,10),id=1:10,pid=1001:1
On 31/03/2015 1:05 PM, Kevin E. Thorpe wrote:
> Hello.
>
> I am trying to simulate recruitment in a randomized trial. Suppose I
> have three streams (strata) of patients represented by these data frames.
>
> df1 <- data.frame(strat=rep(1,10),id=1:10,pid=1001:1010)
> df2 <- data.frame(strat=rep(2
That's a fun one. Here's one possible approach. (Note that it can be
done without using a loop, but I find that a loop here increases
readability.)
I wrote it to work on a list of data frames. If the selection is
random, I'd set it up so that size is passed to the function, but
selection is genera
Hello.
I am trying to simulate recruitment in a randomized trial. Suppose I
have three streams (strata) of patients represented by these data frames.
df1 <- data.frame(strat=rep(1,10),id=1:10,pid=1001:1010)
df2 <- data.frame(strat=rep(2,10),id=1:10,pid=2001:2010)
df3 <- data.frame(strat=rep(3,
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