[R] Gradient color to a line graph

[David Winsemius]

> On Feb 4, 2017, at 9:14 AM, Riyas MJ <riyasmjgeo at gmail.com> wrote:
> 
> Hi all,
> 
> I am a new user of R. I just did my first real program.
> I would like to know how to put a gradient (like rainbow() or topo.colors,
> etc) to a* line* graph.
> 
> Example:
> ar1=array(data=1:10,dim=9)
> ar2=array(data=11:20,dim=9)
> plot(ar1,ar2,type="l",col="red",lwd=3)
> 
> Instead of a red color, I would like to make it in rainbow colors.
> Tried to do my own and tried searching but everywhere its about giving
> gradient to point graph, not to a line graph. Please help, it is needed for

Install the plotrix package and look in its Index page for a function name that has both `color` and `line` in its name.

-- 
David.
> my work.
> 
> Thanks in advance
> -- 
> Riyas MJ
> Project assistant (PA -II)
> Physical Oceanography Department (POD)
> CSIR- National Institute of Oceanography (NIO)
> Dona Paula, Goa - 403 004, India
> Ph: +91 9037553320, +91 7083030397
> 
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> 
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David Winsemius
Alameda, CA, USA