R help - Jul 2004 - color scale to label a plot

Hello R-helpers

  I want to put a color scale in a plot:
  
I've got an xy plot where the values of the response (z=f(x,y)) is
symbolically given by colors (like heat or rainbow color scale)
I would like to put such a scale with apprpriates labels in the plot, so as to
facilitate the interpretation (like in a finite elements result plot)
How is taht possible?

Thanks
Anne
  
	[[alternative HTML version deleted]]

yes..  legend sould help. I still do not know how to paint my color sacle
and put the corresp. labels correctly
Thanks
Anne

----- Original Message ----- 
From: "Berton Gunter" <gunter.berton at gene.com>
To: "Anne" <anne.piotet at urbanet.ch>
Sent: Thursday, July 15, 2004 5:55 PM
Subject: Re: [R] color scale to label a plot

> Do you mean ?legend  ??
>
> On lattice plots, the key= argument controls legends. ?xyplot gives
details.
>
>
>
> --
>
> Bert Gunter
>
> Non-Clinical Biostatistics
> Genentech
> MS: 240B
> Phone: 650-467-7374
>
>
> "The business of the statistician is to catalyze the scientific
learning
process."
>
>  -- George E.P. Box
>
>

>>>>> "Anne" == Anne Piotet <anne.piotet at
urbanet.ch>
>>>>>     on Thu, 15 Jul 2004 17:50:17 +0200 writes:
    Anne> Hello R-helpers
    Anne> I want to put a color scale in a plot:
  
    Anne> I've got an xy plot where the values of the response
    Anne> (z=f(x,y)) is symbolically given by colors (like heat
    Anne> or rainbow color scale) I would like to put such a
    Anne> scale with apprpriates labels in the plot, so as to
    Anne> facilitate the interpretation (like in a finite
    Anne> elements result plot) How is taht possible?

Use
         filled.contour()   
or also  image(*); contour(*, add=TRUE)

Martin

  
    Anne> [[alternative HTML version deleted]]
	   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Anne, have you ever tried to get rid of this?  

      --> http://www.R-project.org/mail.html and look for "HTML"

Bonnes salutations de Zurich,
Martin Maechler

Anne:

Perhaps this example will help.  

I have data (several dozen observations at each condition) for different
R=stress.ratio.  The stress.ratios are:
> stress.ratio
 [1] 0.1 0.1 0.1 0.2 0.3 0.5 0.6 0.7 0.8 0.9 0.9 0.9 0.9 0.9 0.9

You will notice multiple datasets for R=0.1 and R=0.9.

I assigned colors to each stress.ratio, such that

 R.color
 [1] "black"      "black"      "black"     
"red"        "orange"     "gray"
"green"      "light blue" "blue"       "dark
blue"
[11] "dark blue"  "dark blue"  "dark blue" 
"dark blue"  "dark blue"


Then I plotted the legend on my plot this way:

legend(x.coordinate, y.coordinate, unique(stress.ratio),
col=unique(R.color), pch=15, cex=0.8)

Best wishes.

Charles Annis, P.E.
 
Charles.Annis at StatisticalEngineering.com
phone: 561-352-9699
eFax:  503-217-5849
http://www.StatisticalEngineering.com
-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Anne
Sent: Thursday, July 15, 2004 12:42 PM
To: r-help at stat.math.ethz.ch; Berton Gunter
Subject: Re: [R] color scale to label a plot

yes..  legend sould help. I still do not know how to paint my color sacle
and put the corresp. labels correctly
Thanks
Anne

----- Original Message ----- 
From: "Berton Gunter" <gunter.berton at gene.com>
To: "Anne" <anne.piotet at urbanet.ch>
Sent: Thursday, July 15, 2004 5:55 PM
Subject: Re: [R] color scale to label a plot

> Do you mean ?legend  ??
>
> On lattice plots, the key= argument controls legends. ?xyplot gives
details.
>
>
>
> --
>
> Bert Gunter
>
> Non-Clinical Biostatistics
> Genentech
> MS: 240B
> Phone: 650-467-7374
>
>
> "The business of the statistician is to catalyze the scientific
learning
process."
>
>  -- George E.P. Box
>
>
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