[R] color.scale error

[Alaios]

Dear Jim,
this is just to confirm that it your solution worked :)

Regards
Alex

--- On Fri, 2/18/11, Jim Lemon <jim at bitwrit.com.au> wrote:

> From: Jim Lemon <jim at bitwrit.com.au>
> Subject: Re: [R] color.scale error
> To: "Alaios" <alaios at yahoo.com>
> Cc: R-help at r-project.org
> Date: Friday, February 18, 2011, 9:10 AM
> On 02/18/2011 04:31 AM, Alaios
> wrote:
> > Dear all
> > when I call color.scale like this:
> >
> >
> > require('plotrix')
> >
> colcolor<-color.scale(c(range_sr,sr),extremes=c("red","blue"))
> >
> >
> > Error in if (min(reds)<  0 ||
> max(reds)>  1) reds<- rescale(reds, c(0,  :
> >    missing value where TRUE/FALSE needed
> >
> >
> > range_sr
> > [1] -10.00000000000000  44.02977813958366
> >
> > str(sr)
> >   num [1:100, 1:100] 2.54 2.71 2.89
> 2.95 3.03 ...
> >
> >
> > this was working on simpler data sets before.
> >
> > How can I understand more what was the problem in
> depth.? I have read the source code of color.scale but
> unfortunately I did not make any progress to understand this
> error message. Is it possible to raise an exception before
> the error happens and see what went wrong?
> >
> Hi Alex,
> When you concatenate (c) the extremes and the matrix, you
> get a vector:
> 
>  > sr<-matrix(runif(10000,-10,44.03),100,100)
>  > str(sr)
>   num [1:100, 1:100] 11.2 27.13 4.13 -4.46 26.44 ...
>  > sr_colors<-color.scale(c(-10,44.03,sr))
>  > str(sr_colors)
>   chr [1:10002] "#000000" "#FFFFFF" "#646464"
> "#AFAFAF" "#434343" ...
> 
> Recreate the matrix:
> 
> sr_colors<-matrix(sr_colors[-(1:2)],100,100)
> 
> and all should be well.
> 
> Jim
> 
>