[R] how to change automatically 0=no and 1=yes

[Gabor Grothendieck]

One thing to be careful of is that we likely intend to
represent the columns of the data frame as factors in which
case we still want the levels to be No and Yes even if a
column only consists of one level (i.e. all No or all Yes).
Note that one solution specifically provided for that.

On 6/15/05, Muhammad Subianto <subianto at gmail.com> wrote:
> Dear all,
> Sean Davis, Dimitris Rizopoulos and Marc Schwartz, thanks for your great
> help. It works perfectly. Thanks a lot.
> All the best,
> Muhammad Subianto
> 
> On this day 6/15/2005 4:06 PM, Sean Davis wrote:
>  >  > x <- data.frame(matrix(c(1,0,1,0,1,1),nrow=3))
>  >  > x[x==0] <- 'no'
>  >  > x[x==1] <- 'yes'
>  >  > x
>  >     X1  X2
>  > 1 yes  no
>  > 2  no yes
>  > 3 yes yes
>  >
> 
> On this day 6/15/2005 4:06 PM, Dimitris Rizopoulos wrote:
>  > try this:
>  >
>  > dat <- data.frame(matrix(sample(0:1, 100 * 20, TRUE), 100, 20))
>  > ############
>  > dat[] <- lapply(dat, factor, levels = c(0, 1), labels = c("no",
>  > "yes"))
>  > dat
>  >
> 
> On this day 6/15/2005 4:16 PM, Marc Schwartz wrote:
>  >
>  >
>  >>as.data.frame(ifelse(df == 0, "No", "Yes"))
>  >
> 
> 
> On this day 6/15/2005 3:58 PM, Muhammad Subianto wrote:
> > Dear R-helpers,
> > I have dataset (data.frame) like below,
> >    x1  x2  x3   x4   x5  x6  x7  x8  x9 ... x1200
> >     0    0    0    1    1    0    0    1    1
> >     1    0    0    1    1    0    0    1    1
> >     0    1    0    1    1    0    0    1    1
> >     1    1    0    1    1    0    0    1    1
> > ...
> > How can I change automatically 0=no and 1=yes.
> >
> > Thank you very much in advance.
> > Kindly regards,
> > Muhammad Subianto
> >
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> 
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