[R] Gradient color to a line graph

[Riyas MJ]

Thank you so much. Both worked well. Thanks

On Sun, Feb 5, 2017 at 2:27 AM, Jeff Newmiller <jdnewmil at dcn.davis.ca.us>
wrote:

> You haven't indicated what information you want to convey with this
> gradient.
>
> You also are using arrays where you should be using vectors, usually
> stored in a data frame.
>
> Here is one way using the contributed package ggplot2:
>
> library(ggplot2)
> DF <- data.frame( V1=1:10, V2=11:20, C=21:30 )
> p <- ggplot( DF, aes( x=V1, y=V2, colour=C ) ) +
>     geom_line( size=2 ) +
>     scale_colour_gradient( low="red", high="blue" )
> print( p )
>
>
> --
> Sent from my phone. Please excuse my brevity.
>
> On February 4, 2017 12:19:14 PM PST, David Winsemius <
> dwinsemius at comcast.net> wrote:
> >
> >> 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.
>



-- 
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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