[R] Stacked bar plot anomaly When column contains a negative and a positive value
Duncan Murdoch
murdoch at stats.uwo.ca
Sat May 3 22:10:08 CEST 2008
On 03/05/2008 3:29 PM, Murray Richardson wrote:
> Hello users,
>
> I've noticed a problem when creating a stacked column plot when a column
> contains a negative and a positive value. e.g.
>
> series1<-c(-1,-2, 3, 4, 5)
> series2<-c( 5, -4,-3,-2, 1)
> data<-rbind(series1,series2)
> barplot(as.matrix(data), beside=FALSE)
>
>
> In these cases (i.e. first, third and fifth columns) the plotting is not
> handled correctly. Compare this output with that of:
It doesn't make sense to stack values with mixed signs, but what barplot
does appears to make sense. The first column has a bar of length -1
overplotted with a bar of length 5, which completely obscures it. What
would you expect it to do?
Duncan Murdoch
>
>
> barplot(as.matrix(data), beside=TRUE)
>
>
> Shouldn't the plots look the same except in the beside=FALSE scenario
> the constituent bars should not be juxtaposed but instead are one on top
> of the other?
>
> Thanks for any advice!
>
> Murray Richardson
>
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