[R] barplot colour problem

[Marc Schwartz]

> On Jul 18, 2016, at 1:06 PM, Abdoulaye Sarr <abdoulayesar at gmail.com> wrote:
> 
> I am doing a basic bar plot which works but the color of bars positive
> (green) and negative (brown) don’t show up from the below command:
> 
> barplot(z, ylim=c(-2,2), col=ifelse(x>0,"brown","green »))
> 
> any help? or other methods?
> 
> fipou


Presuming that the above is a direct copy and paste, your ifelse() statement is using 'x' to determine the color, rather than 'z'. Presumably a typo?

This works, for example, with 'z' as a vector:

  z <- seq(from = -5, to = 5)

  barplot(z, col = ifelse(z > 0, "brown", "green"))


Regards,

Marc Schwartz