[R] How to plot with different colours

[Bernardo Rangel Tura]

On Sun, 2008-11-02 at 07:58 +0000, Carlos Morales wrote:
> Hello everyone,
> 
> I'm trying to plot 3600 points and my idea is if this value is higher than 0.35 then this point must appear in green colour, if it's smaller than -0.35 then values must appear in red and if values are between -0.35 and 0.35 they must be in yellow. I'm thinking and I'm trying many things but I don't achieve it. Any idea?.
> 
> Thanks so much
> Carlos Morales Diego

Hi Carlos

I think you need use a nested ifelse, something similar this

x<-runif(6000,-1,1)
color<-ifelse(x>.35,"green",ifelse(x< -.35,"red","yellow"))
table(col)
plot(1:6000,x,col=color)

-- 
Bernardo Rangel Tura, M.D,MPH,Ph.D
National Institute of Cardiology
Brazil