[R] plot labeling and expressions

Uwe Ligges ligges at statistik.tu-dortmund.de
Wed Jan 16 11:55:00 CET 2008

Johannes Graumann wrote:
> Hi all,
> I'm trying to use an iteration that appends something to vector 'peaklabels'
> like so:
> peaklabelNames <- append(
>         peaklabelNames,
>         substitute(i^{z+phantom()}*" ("*a*"AMU)",list(i="y2",z=2,a=0))
> )
> The vector is supposed to be used with 'text' to put labels on signals in an
> impulse plot.
> While not vectorized
>         substitute(i^{z+phantom()}*" ("*a*"AMU)",list(i="y2",z=2,a=0))
> works for me, the vectorized form doesn't. The labels are represented as 
>         "y2"^2 (AMU)
> (note the '"' in the printed string). Can anyone please give me a hint on
> how to resolve this?

I do not know what you mean by vectorized form. Can you give an example 
what you want to achieve and what you tried to do so?

Uwe Ligges

> Thanks, Joh
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