[R] heatmap help

[Liaw, Andy]

I believe you want to pass the (symmetric) matrix as is, rather than wrapped
in as.dist().  E.g.,

x <- as.matrix(dist(matrix(rnorm(100), 20, 5)))
heatmap(x, symm=TRUE, scale="none")

HTH,
Andy

> From: Paul Lepp
> 
> Dear R wizards,
> 	Hopeful someone can help me with what I believe is a 
> pretty simple task.  I
> pretty new to R so some (much) of the obvious escapes me. How 
> do I get a
> distance matrix into heatmap?  What do I tell distfun if what 
> I'm trying to
> map is already an ordered distance matrix?  I tried >heatmap(x,
> distfun=as.dist(x)) where x is the distance matrix but R gave 
> me an error.
> Thanks in advance for any help.
> 
> Paul Lepp
> 
>  `-:-.   ,-;"`-:-.   ,-;"`-:-.   ,-;"`-:-.   ,-;"`-:-.   ,-;"`-:-.
>    `=`,'=/     `=`,'=/     `=`,'=/     `=`,'=/     `=`,'=/     `=`
>      >==/        >==/        >==/        >==/        >==/
>    ,=,-<=`.    ,=,-<=`.    ,=,-<=`.    ,=,-<=`.    ,=,-<=`.    ,=,
> ,-'-'   `-=_,-'-'   `-=_,-'-'   `-=_,-'-'   `-=_,-'-'   `-=_,-'-'
> Paul Lepp, Ph.D.                       Stanford School of Medicine
> 
> VAPAHCS, 154T                   Dept. of Microbiology & Immunology
> 3801 Miranda Ave                               Stanford University
> Palo Alto, CA 94304                                   Stanford, CA
> (650) 493-5000 x66762		               fax: (650) 852-3291
> http://cmgm.stanford.edu/~pwlepp          pwlepp at cmgm.stanford.edu
> 
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