put look-up labels in a legend instead of on top of data

[Adam_L...@keybank.com]

Sorry,

I realized my initial framing of the question may not get me the answer I need. I want to display labels in a legend, but I want to do so correspondingly to another label.

For example, below in tst there are two labels, desc and desc2. I'd like to display desc just as geom_text does by default, on the plot.

But I'd also like to display desc2 in a legend.

Basically, I have a bunch of labels that won't fit into my plot, and want to create indicators for them that do fit on the plot, but that can be "looked up" in a legend, that contains full descriptions.

The example below does the first part of what I need to do, but does not create a legend with the names, "one", "two","three", etc..

Thanks anyone in advance for your help.


tst<-data.frame(x=runif(6),y=runif(6),desc=c("1","2","3","4","5","6"),desc2=c("one","two","three","four","five","six"))
ggplot(tst,aes(x,y))+geom_point()+geom_text(aes(label=desc),size=3,vjust=-1)




Adam Loveland


----- Forwarded by Adam Loveland/GL/KB/KeyCorp on 01/24/2011 12:04 PM -----

Adam Loveland/GL/KB/KeyCorp 01/24/2011 11:58 AM

To ggplot2 <ggp...@googlegroups.com> cc Subject put labels in a legend instead of on top of data

Good noon,

I'm wondering if there's a built-in way to display labels associated with values in a legend, as opposed to on the plot (the default manner in which geom_text displays labels).

tst<-data.frame(x=runif(6),y=runif(6),desc=c("1","2","3","4","5","6"))
ggplot(tst,aes(x,y))+geom_point()+geom_text(aes(label=desc),size=3,vjust=-1)

Referring to the example above, I'd like a legend that's titled, "desc" with values 1-6, instead of the labels displayed along-side each point. I'm optimistic this is easily done in ggplot2, but couldn't figure out how to do it.

Thanks anyone in advance for your help.

Adam Loveland



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[Ista Zahn]

Hi Adam,
ggplot2 isn't really set up to do this (there is no scale_numeric as
far as I know). You can kind of fake it;

ggplot(tst,aes(x,y))+geom_point()+geom_text(aes(label=desc),size=3,vjust=-1)
+ geom_blank(aes(size=paste(desc, "=", desc2)))

but it's ugly. You could probably clean it up a bit with opts() but I
don't know if you can get it to really look right.

Best,
Ista

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[Adam_L...@keybank.com]

And who really cares that it isn't (I don't)? For me, the fact I'm asking the question puts the fear of Cognos in my heart. In my defense, it is a legitimate statistical analysis I've under-taken. It's the legitimacy of its consumers I cannot account for.



Adam Loveland

Ista Zahn <iz...@psych.rochester.edu> Sent by: ista...@gmail.com 01/24/2011 06:32 PM

To Adam_L...@keybank.com cc ggplot2 <ggp...@googlegroups.com> Subject Re: put look-up labels in a legend instead of on top of data

[Mike Lawrence]

This solution doesn't seem to work anymore (no legend is created). Any suggestions on a fix that will work with the current version of ggplot2?

[Mike Lawrence]

Nevermind, figured it out:

ggplot(tst,aes(x,y))+

geom_point()+

geom_text(aes(label=desc),size=3,vjust=-1)+
geom_point(aes(size=paste(desc, "=", desc2)),colour='transparent')

will do the trick.