[R] Colsplit, removing parts of a string

[Rui Barradas]

Hello,

By looking at the output of

pat <- "(str)|(_name)|( name)"
strsplit(c("str1_name2", "str3_name5"), pat)
[[1]]
[1] ""  "1" "2"

[[2]]
[1] ""  "3" "5"

I could understand why colsplit includes NAs as column 'str' values.
So the hack is to fake we want three coluns and then set the first one 
to NULL.

df2 <- data.frame(df1, colsplit(df1$x, pattern = pat, names=c("Null", 
"str","name")))
df2$Null <- NULL
df2

I don't like it very much but it's simple and it works.

Hope this helps,

Rui Barradas
Em 27-09-2012 12:25, Johannes Radinger escreveu:
> Hi,
>
> I am using colsplit (package = reshape) to split all strings
> in a column according to the same patterns. Here
> an example:
>
> library(reshape2)
>
>
> df1 <- data.frame(x=c("str1_name2", "str3_name5"))
> df2 <- data.frame(df1, colsplit(df1$x, pattern = "_", names=c("str","name")))
>
> This is nearly what I want but I want to remove the words "str" and
> "name" from the values, because the columns are already named with
> that words. Is there a way to remove them using colsplit? Or any other
> simple way?
>
> /johannes
>
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