[BioC] Title for a matplot

[James W. MacDonald]

Hi Dennis,

Dennis.Burian at faa.gov wrote:
> 
> 
> 
> Dear all,
> 
> I ran the following command to add a title to a matplot the logic being
> that the help for matplot refers the reader to the help for plot.  As you
> can see, matplot doesn't recognize the title argument.  Any other ideas for
> a way to get a title added to the matplot?
> 
> 
>>matplot(pm(BucBlAfBatch,"31962_at"),type="l",xlab="Probe No.",ylab="PM
> 
> Probe Intensity",(title(main="31962")))
> Error in title(main = "31962") : plot.new has not been called yet

You can either use the 'main' argument from within the call to matplot 
(see e.g., the first example in ?matplot), or use a separate call of

title(main="31962")

after the call to matplot().

But you can't do what you are attempting because the parser works from 
the inside out. In other words, the parser will first evaluate 
title(main="31962") and then evaluate the overall call to matplot() 
(which is why you can get away with function calls within other function 
calls). However, in your case, plot.new() hasn't been called yet when 
title() is evaluated so you get an error.


Best,

Jim
> 
> Dennis Burian, Ph.D.
> Functional Genomics Group
> Civil Aerospace Medical Institute, AAM-610
> 6500 S. MacArthur Blvd.
> Oklahoma City OK  73169
> 405-954-6087
> dennis.burian at faa.gov
> 
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-- 
James W. MacDonald, M.S.
Biostatistician
Affymetrix and cDNA Microarray Core
University of Michigan Cancer Center
1500 E. Medical Center Drive
7410 CCGC
Ann Arbor MI 48109
734-647-5623


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