Changing legend to fill colour in ggplot
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