[R] Transposing by a group variable
John Kane
jrkrideau at yahoo.ca
Thu Feb 14 20:09:38 CET 2008
How do we know what value corresponds to what new
variable?
library(reshape)
mm <- melt(d, id="group")
cast(mm, group~value)
will give you something but not quite what you want.
--- Shubha Vishwanath Karanth
<shubhak at ambaresearch.com> wrote:
> Hi R,
>
>
>
> Can I transpose a data frame by a particular group
> variable?
>
>
>
> For example:
>
> d=data.frame(group=c(1,1,2,2,2),val=c(6,4,6,3,5))
>
> And my output should be:
>
>
data.frame(group=c(1,2),v1=c(6,6),v2=c(4,3),v3=c(NA,5))
>
>
>
> Many thanks,
>
> Shubha
>
> This e-mail may contain confidential and/or
> privileged i...{{dropped:13}}
>
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