Thanks a lot Biran,
  This is exactly what I was looking for. Thanks a ton.
B
est wishes,
Mitra



On 29 June 2013 02:51, Brian Diggs <diggsb@ohsu.edu> wrote:

> On 6/27/2013 12:34 AM, Suparna Mitra wrote:
> > Hello R experts,
> >    I am having a problem to edit legend in ggplot using four variables.
> >
> > My data structure is :
> > str(df)
> > 'data.frame': 10 obs. of  6 variables:
> >   $ id                        : Factor w/ 2 levels "639A","640": 1 1 1 1
> 1 2
> > 2 2 2 2
> >   $ species                   : Factor w/ 5 levels
> "acinetobacter_sp",..: 2
> > 5 1 4 3 2 5 1 4 3
> >   $ genome_coverage_bp        : int  8196 3405 8625 22568 2128 6100 1841
> > 3914 8487 1064
> >   $ genome_length             : int  3571237 2541445 3912725 3479613
> 5460977
> > 3571237 2541445 3912725 3479613 5460977
> >   $ genome_coverage_percentage: Factor w/ 10 levels "0.02%","0.04%",..:
> 8 5
> > 7 10 2 6 3 4 9 1
> >   $ avg_depth_coverage        : num  121.96 2.81 19.84 399.63 1.64 ...
> >
> >
> > Now what I did is
> >
> p=ggplot(df,aes(genome_coverage_percentage,avg_depth_coverage))+geom_point(aes(colour
> > = species,shape = factor(id)))
> > p+scale_shape_discrete(name  ="",labels=c("Patient 1", "Patient 2"))
> > That creats the plot below.
> > But I want to change the circles of legend in fill colour. So that it
> > doesn't look like it is only from Patient 1, as that also has circle.
> > Can anybody help me please?
>
> You can change the default aesthetics displayed in the legend using the
> override.aes argument to guide_legend.
>
> scale_colour_discrete(guide=guide_legend(override.aes=aes(shape=15)))
>
> Also, when giving data, especially a data set this small, give the
> output of dput(df) as that gives the complete data in a format that can
> be used to recreate it exactly in someoneelse's session. If I had that,
> I would test this to make sure it looks right.
>
> > Thanks a lot in advance :)
> > Mitra
> >
> >
> >
>
>
> --
> Brian S. Diggs, PhD
> Senior Research Associate, Department of Surgery
> Oregon Health & Science University
>

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