R help - Feb 2008 - Help wit barplot

Hi

I have som problems with a barplot. It can be created easily in Excel but I
cant manage to get it right in R.

For example:
MyData <-
matrix(c(1,2,-1,-1,0,-2,-2,1,1,1,-2,3),ncol=3,dimnames=list(LETTERS[1:4],seq(3)))

I want the barplot to stack the positive and negative values separatly so
that positive values are stacked over 0 and negative is stacked under 0. 

I have added a jpg of the graph in excel 
http://www.nabble.com/file/p15542914/Excel.jpg Excel.jpg 

Regards Tom
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Tom.O wrote:
> Hi
>
> I have som problems with a barplot. It can be created easily in Excel but I
> cant manage to get it right in R.
>
> For example:
> MyData<-
>
matrix(c(1,2,-1,-1,0,-2,-2,1,1,1,-2,3),ncol=3,dimnames=list(LETTERS[1:4],seq(3)))
>
> I want the barplot to stack the positive and negative values separatly so
> that positive values are stacked over 0 and negative is stacked under 0.
>
> I have added a jpg of the graph in excel
> http://www.nabble.com/file/p15542914/Excel.jpg Excel.jpg
>
> Regards Tom
Tom,

See this post from last year:

   http://finzi.psych.upenn.edu/R/Rhelp02a/archive/100161.html

HTH,

Marc Schwartz