[R] data.frame loses name when constructed with one column

[jim holtman]

Try drop=FALSE:

> x
  out pred1 predd2
1   1   2.0    3.0
2   2   3.5    5.5
3   3   5.5   11.0
> x[,1]
[1] 1 2 3
> data.frame(x[,1])
  x...1.
1      1
2      2
3      3
> data.frame(x[,1, drop=FALSE])
  out
1   1
2   2
3   3
>


On 9/4/07, Stan Hopkins <stanhopkins at comcast.net> wrote:
> Not sure why the data.frame function does not capture the name of the column field when its being built with only one column.
>
> Can anyone help?
>
>
>
> > data
>  out pred1 predd2
> 1   1   2.0    3.0
> 2   2   3.5    5.5
> 3   3   5.5   11.0
> > data1=data.frame(data[,1])
> > data1
>  data...1.
> 1         1
> 2         2
> 3         3
> > data1=data.frame(data[,1:2])
> > data1
>  out pred1
> 1   1   2.0
> 2   2   3.5
> 3   3   5.5
> > sessionInfo()
> R version 2.5.1 (2007-06-27)
> i386-pc-mingw32
>
> locale:
> LC_COLLATE=English_United States.1252;LC_CTYPE=English_United States.1252;LC_MONETARY=English_United States.1252;LC_NUMERIC=C;LC_TIME=English_United States.1252
>
> attached base packages:
> [1] "stats"     "graphics"  "grDevices" "utils"     "datasets"  "methods"
> [7] "base"
> >
>
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>
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>


-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem you are trying to solve?