[R] reverse variables

[Gabor Grothendieck]

There is a function here:

  http://tolstoy.newcastle.edu.au/R/help/04/06/1430.html

that will facilitate this sort of construct:

a <- 1; b <- 2
list[b,a] <- list(a,b)
a; b # 2 1

On 6/9/06, David Hajage <dhajage at gmail.com> wrote:
> Hello useRs,
>
> Is there a way to reverse values of 2 variables (like with the language
> Python) ? :
>
> a <- 1
> b <- 2
>
> a, b <- b, a
>
> More specifically, I have a data frame :
>
>   famnum generation germain1 germain2  fa  mo ptpn1 ptpn2 drb11 drb12
>       1          2      200      201 101 102     1     1     1     1
>       2          2      200      201 101 102     0     1     1     1
>       3          2      200      201 101 102     1     0     1     1
> ...
>
> I don't want "0" in the seventh column, so I would like to have :
>
>   famnum generation germain1 germain2  fa  mo ptpn1 ptpn2 drb11 drb12
>       1          2      200      201 101 102     1     1     1     1
>       2          2      201      200 101 102     1     0     1     1
>       3          2      200      201 101 102     1     0     1     1
> ...
>
> I thought that a code like this would work :
>
> if (ptpn1 == 0 & ptpn2 == 1)
>  {
>    germain1, germain2 <- germain2, germain1
>    ptpn1, ptpn2 <- ptpn2, ptpn1
>    drb11, drb12 <- drb12n, drb11
>  }
>
> But R is not Python... Is there a way to do it easyly ?
>
> Thank you.
> --
> David
>
>        [[alternative HTML version deleted]]
>
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