list as object in dataframe

df$x is list so you have to use this type of assignment
df$x[[1]] <- c('a','b')
df
y    x
1 1 a, b
2 1 f, c
3 1    a
df$x[[3]] <- letters
df
y            x
1 1         a, b
2 1         f, c
3 1 a, b, c,....
str(df)
'data.frame':   3 obs. of  2 variables:
 $ y: num  1 1 1
 $ x:List of 3
  ..$ : chr  "a" "b"
  ..$ : chr  "f" "c"
  ..$ : chr  "a" "b" "c" "d" ...
  ..- attr(*, "class")= chr "AsIs"

Hi All,

I need to place lists or vectors within dataframes as single
elements.  However when I try this:

df=data.frame(y=1, x=I(list(c("a","b"), c("f","c"), c("a"))))
df

df[1,'x']=I(c("a","d"))

I get this error, even though I am using I():

Error in `[<-.data.frame`(`*tmp*`, 1, "x", value = c("a", "d")) :
replacement has 2 rows, data has 1

Note that this behavior does not match that described here <http://
finzi.psych.upenn.edu/R/Rhelp02a/archive/37297.html>  in this post
from 2004.

Can someone please point me towards the right way to do this?

Thanks!!

Dan

$platform
[1] "i386-apple-darwin8.10.1"

$arch
[1] "i386"

$os
[1] "darwin8.10.1"

$system
[1] "i386, darwin8.10.1"

$status
[1] ""

$major
[1] "2"

$minor
[1] "6.2"

$year
[1] "2008"

$month
[1] "02"

$day
[1] "08"

$`svn rev`
[1] "44383"

$language
[1] "R"

$version.string
[1] "R version 2.6.2 (2008-02-08)"

       [[alternative HTML version deleted]]

______________________________________________
R-help at r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.

Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem you are trying to solve?

list as object in dataframe

Thread (2 messages)