[R] ggplot2: annotating plot with mathematical formulae

[Paul Emberson]

Hi Baptiste,

I think on this occasion I'll edit manually in inkscape with the textext
plugin which is a somewhat clumsy but simple option.  Thanks for the
link to the wiki which I wasn't aware of until now.

Paul

baptiste auguie wrote:
> If you're desperate for a workaround, you might want to try this
> example using pgfSweave,
>
> http://ggplot2.wik.is/Mathematical_annotations
>
> On a similar vein, you could try psfrag replacements with a postscript
> device (there is some code for this on the list archives).
>
> Feel free to comment / edit on the wiki page.
>
> HTH,
>
> baptiste
>
> On 16 May 2009, at 14:48, Paul Emberson wrote:
>
>> Hi Stephen,
>>
>> The problem is that the label on the graph doesn't get rendered with a
>> superscript.  I want the label on the graph to be rendered the same way
>> as the label you have put on the axis.
>>
>> I am plotting a piecewise function and I wanted to label each section
>> of it.
>>
>> Paul
>>
>> stephen sefick wrote:
>>> how about this
>>>
>>> a <- 1:10
>>> b <- 1:10
>>> d <- paste("x","^","{n-1}")
>>> qplot(a,b, xlab=expression(x^{n-1}))+geom_text(aes(4,8, label=d))
>>>
>>> On Fri, May 15, 2009 at 10:02 PM, Paul Emberson
>>> <email at calidasoft.co.uk> wrote:
>>>
>>>> Hi,
>>>>
>>>> Is there a way of annotating a ggplot plot with mathematical formulae?
>>>>
>>>> I can do
>>>>
>>>> geom_text(aes(label="some text", ...
>>>>
>>>> but I can't do
>>>>
>>>> geom_text(aes(label=expression(x^{n-1}), ...
>>>>
>>>> It gives the error
>>>>
>>>> Error: geom_text requires the following missing aesthetics: label
>>>>
>>>> Is there a convenient equivalent?
>>>>
>>>> Cheers,
>>>>
>>>> Paul
>>>>
>>>> ______________________________________________
>>>> R-help at r-project.org mailing list
>>>> https://stat.ethz.ch/mailman/listinfo/r-help
>>>> PLEASE do read the posting guide
>>>> http://www.R-project.org/posting-guide.html
>>>> and provide commented, minimal, self-contained, reproducible code.
>>>>
>>>>
>>>
>>>
>>>
>>>
>>
>> ______________________________________________
>> R-help at r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>
> _____________________________
>
> Baptiste Auguié
>
> School of Physics
> University of Exeter
> Stocker Road,
> Exeter, Devon,
> EX4 4QL, UK
>
> Phone: +44 1392 264187
>
> http://newton.ex.ac.uk/research/emag
> ______________________________
>