[R] why "object 'x' not found"?

[jim holtman]

try this:

> x <- read.table(text = "v1 v2 v3
+ 1   0   0
+ 0   1   0
+ 0   0   1", header = TRUE)
>
> x$v4 <- apply(x, 1, function(a) which(a == 1))
> x
  v1 v2 v3 v4
1  1  0  0  1
2  0  1  0  2
3  0  0  1  3
>
>
>


On Thu, Feb 7, 2013 at 1:20 PM, Winfried Moser <winfried.moser at gmail.com> wrote:
> Dear Listers,
>
> I try to change the structure of my data. i have an indicator-matrix and
> want to end up with a factor.
>
> i have
>
> v1 v2 v3
> 1   0   0
> 0   1   0
> 0   0   1
>
> and want
>
> v1 v2 v3  v4
> 1   0   0   1
> 0   1   0   2
> 0   0   1   3
>
> amongst other things i tried the following
>
> d <- data.frame(d1=c(1,0,0), d2=c(0,1,0), d3=c(0,0,1))
> d$nr <- NA
> sapply(1:3, function(x) ifelse(get(paste0("d$d",x))==1,x,d$nr))
>
> >From R i get the message "Object 'd$d1' not found".
> But why, it's there?
>
> Thanks a lot.
> Winfried
>
>         [[alternative HTML version deleted]]
>
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-- 
Jim Holtman
Data Munger Guru

What is the problem that you are trying to solve?
Tell me what you want to do, not how you want to do it.