[R] changing colors in filled.contour

[William Dunlap]

After
     mylevels <- seq(0,10,10)
mylevels has length 2, hence you get 2 colors.  Use length=10,


Bill Dunlap
TIBCO Software
wdunlap tibco.com

On Wed, Oct 7, 2015 at 3:40 AM, begrinner <j.terheyden at t-online.de> wrote:

> Dear R community!
>
> I haven't worked with R before but I found it has some nice abilities to
> create graphics. I made it to create a filled.contour with the settings I
> want but unfortunately I don't seem to be able to change colors. Instead of
> the standard colors, I'd like to get dark gray or black for higher values
> (instead of pink) and light gray or white for lower values (instead of
> cyan).  A second option I'd like to try is having colors change from green
> (low values) to red (high values)... but right now it seems like I'm miles
> away from that.
>
> This is what I have so far:
>
> model=function(a, b){+4+0.5*a-0.2*b}
> x=seq(-10, 10, by = 2)
> y=seq(0, 100, by = 10)
> z=outer(x, y, model)
> contour(x,y,z,nlevels=12)
> mylevels <- seq(0,10,10)
> filled.contour(x,y,z, main="Title")
>
> But when I try to Change the Color theme like this -
>
>
> filled.contour(x,y,z,levels=mylevels,col=grey(seq(0,1,length=length(mylevels))))
>
>  - I just get one white and one black bar.
>
> Does anyone of you know a solution?
>
> Thanks in advance, you'd help me a lot as I've been working on these few
> lines for a couple already.
>
> J
>
>
>
>
> --
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>
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