> -Original Message-
> From: r-help-boun...@r-project.org
> [mailto:r-help-boun...@r-project.org] On Behalf Of Luca Meyer
> Sent: Monday, December 20, 2010 11:03 AM
> To: Duncan Murdoch
> Cc: R-help@r-project.org
> Subject: Re: [R] Passing parameter to a function
>
Duncan's solution works for me. I strongly suspect that you have not
read the Help file for xtabs carefully enough. Does the "time" column
in D consist of a vector of counts?
> A <- factor(c("A","A","B","B"))
> B <- factor(c(1,2,1,2))
> D <- data.frame(A,B)
> D$time <- c(10,12,14,16)
> tab(A
Hi Duncan,
Yes, A and B are columns in D. Having said that I and trying to avoid
tab(D$A,D$B)
and I would prefer:
tab(A,B)
Unfortunately the syntax you suggest is giving me the same error:
Error in eval(expr, envir, enclos) : object "A" not found
I have tried to add some deparse() but I hav
On 20/12/2010 1:13 PM, Luca Meyer wrote:
I am trying to pass a couple of variable names to a xtabs formula:
> tab<- function(x,y){
xtabs(time~x+y, data=D)
}
But when I run:
> tab(A,B)
I get:
Error in eval(expr, envir, enclos) : object "A" not found
I am quite sure that there is some
I am trying to pass a couple of variable names to a xtabs formula:
> tab <- function(x,y){
xtabs(time~x+y, data=D)
}
But when I run:
> tab(A,B)
I get:
Error in eval(expr, envir, enclos) : object "A" not found
I am quite sure that there is some easy way out, but I have tried with
differen
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