Re: [R] not supressing leading zeros when reading a table?

From: Marc Schwartz <MSchwartz_at_mn.rr.com>
Date: Mon 11 Jul 2005 - 06:18:59 EST

On Sun, 2005-07-10 at 18:13 +0000, Adrian Dusa wrote:
> Dear R list,
>
> I have a dataset with a column which should be read as character, like this:
>
> name surname answer
> 1 xx yyy "00100"
> 2 rrr hhh "01"
>
> When reading this dataset with read.table, I get
> 1 xx yyy 100
> 2 rrr hhh 1
>
> The string column consists in answers to multiple choice questions, not all
> having the same number of answers. I could format the answers using formatC but
> there are over a hundred different questions in there.
>
> I tried with quote="\"'" without any luck. Googling after this take me nowhere
> either. It should be simple but I seem to miss it...
> Can anybody point me to the right direction?
>
> TIA,
> Adrian

With your example data saved in a file called "test.txt":

> df <- read.table("test.txt", header = TRUE, colClasses = "character")

> df

  name surname answer

1   xx     yyy  00100
2  rrr     hhh     01


> str(df)
`data.frame': 2 obs. of 3 variables: $ name : chr "xx" "rrr"

 $ surname: chr "yyy" "hhh"
 $ answer : chr "00100" "01"

See the colClasses argument in ?read.table.

HTH, Marc Schwartz



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