[R] how to write legend of a plot

[Alain Guillet]

  Hi,

There is no way to obtain an automatical legend with plot. The choice 
you have is to draw the legend by yourself or to use another graphical 
package but it is not necessary easier...

For example, the code for the package ggplot2:
donnees <- data.fram(x=x,y=y,y1=y1)
melt(donnees,id="x") -> donnees.m
qplot(x,value,data=donnees.m,colour=variable,geom=c("point","line"))


Alain



On 22-Jul-10 12:17, Yogesh Tiwari wrote:
> Dear R Users,
> If we issue simple plot command in R we don't get legend of the plot
> automatically.
>
> For example, following lines plots two curves, but to write a legend of
> these two curves there is no simple command. I checked with ?legend  but
> it seems bit complicated for me. Does anyone know how to get a legend in a
> simple way for following R plot.
> Thanks, Yogesh
>
>
>
>> plot (x,y, type='n', ann=FALSE)
>> lines(x,y,col=1,lty="solid")
>> points(x,y,pch=16)
>>
>> points (x,y1, type='n', ann=FALSE)
>> lines(x,y1,col=1,lty="solid")
>> points(x,y1,pch=21)
>
>
> -
>
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>
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-- 
Alain Guillet
Statistician and Computer Scientist

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