[R] How not to keep the redundant space when convert a data frame with as.matrix()?

[Don McKenzie]

If you want a matrix of strings

 > x <- data.frame(x=as.character(1:10),y=letters[11:20])
 > as.matrix(x)
       x    y
  [1,] "1"  "k"
  [2,] "2"  "l"
  [3,] "3"  "m"
  [4,] "4"  "n"
  [5,] "5"  "o"
  [6,] "6"  "p"
  [7,] "7"  "q"
  [8,] "8"  "r"
  [9,] "9"  "s"
[10,] "10" "t"

BTW I believe the "=" for assignments is discouraged.  Use "<-".


>> x=data.frame(x=as.character(1:10),y=letters[11:20])
>> as.matrix(x)


On 16-Sep-09, at 3:33 PM, Peng Yu wrote:

> Hi,
>
> The first column in as.matrix(x) has extra spaces (" "), which I don't
> want. Is there a way not to generate those spaces?
>
> Regards,
> Peng
>
>> x=data.frame(x=1:10,y=letters[11:20])
>> as.matrix(x)
>       x    y
>  [1,] " 1" "k"
>  [2,] " 2" "l"
>  [3,] " 3" "m"
>  [4,] " 4" "n"
>  [5,] " 5" "o"
>  [6,] " 6" "p"
>  [7,] " 7" "q"
>  [8,] " 8" "r"
>  [9,] " 9" "s"
> [10,] "10" "t"
>
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Don McKenzie, Research Ecologist
Pacific WIldland Fire Sciences Lab
US Forest Service

Affiliate Professor
School of Forest Resources, College of the Environment
CSES Climate Impacts Group
University of Washington

desk: 206-732-7824
cell: 206-321-5966
dmck at u.washington.edu
donaldmckenzie at fs.fed.us