R help - Jun 2013 - colour coded dotchart

Dear R-Users,

I have a vector x <- 1:10 and I would like to produce a dotchart where the
colour of the dot is black if x <= 5 and red otherwise.

If I use

x <- 1:10
dotchart(x, col="black")

then all dots are obviously of black colour. Has anybody in the mailing
list already dealt with a similar task and found a solution?

Thank you very much in advance for any help.

Marco

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On 09/06/13 01:21, Marco Bianchi wrote:
> Dear R-Users,
>
> I have a vector x <- 1:10 and I would like to produce a dotchart where
the
> colour of the dot is black if x <= 5 and red otherwise.
>
> If I use
>
> x <- 1:10
> dotchart(x, col="black")
>
> then all dots are obviously of black colour. Has anybody in the mailing
> list already dealt with a similar task and found a solution?
Easy-peasy:

     ccc <- ifelse(x<=5,"black","red")
     dotchart(x,col=ccc)

You need to get the hang of reading the online help.  The information
required is actually there in ?dotchart --- it's just tersely and obscurely
expressed.  A certain degree of optimism is required.  You need to
***believe*** that the information is there; then ask yourself "What
could they possibly mean by what they have written that would tell
me what I need to know?".

This is how one should interpret the exhortation "RTFM" when it is
inflicted upon one.

After a few millennia it gets easier! :-)

     cheers,

         Rolf Turner