[R] Pasting R code lines into labels
Bert Gunter
bgunter@4567 @end|ng |rom gm@||@com
Thu Jun 6 18:13:45 CEST 2019
... and if you wanted too streamline the process, something like the
following could be encapsulated in a function:
fun <- quote(exp(x))
z <- 1:9
y <- eval(fun,list(x = z) )
plot(x, y, main = paste("Plot of y =", deparse(fun)))
Further details can be found in the "Computing on the Language" section of
the "R Language Reference" manual or from suitable tutorials on the web.
Bert Gunter
"The trouble with having an open mind is that people keep coming along and
sticking things into it."
-- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
On Thu, Jun 6, 2019 at 8:55 AM Nick Wray via R-help <r-help using r-project.org>
wrote:
> Thanks but that's not quite what I meant
> I am trying out different functions and they don't necessarily vary in a
> regular way (like say all being powers of x where it'd be simple to just
> have a vector for the powers you want)
> So I might have
> y<-x^2
> y<-cos(x)
> y<-exp(x+1)
> What I am after is a way of running these functions and then calling each
> one into the labelling for the appropriate graph as I plot it. So then I
> would have something like
> mainlab<-paste("Plot of ",function in question)
> ...? Thanks Nick
>
> > On 06 June 2019 at 16:40 Marc Schwartz <marc_schwartz using me.com> wrote:
> >
> >
> >
> > > On Jun 6, 2019, at 11:19 AM, Nick Wray via R-help <
> r-help using r-project.org> wrote:
> > >
> > > Is there any way of taking a line of r code (eg y<-x^2) and pasting
> that line of code, as is, into a label, so that for example I could then
> have a plot label "Plot of y<-x^2"?
> > >
> > > Thanks Nick Wray
> >
> >
> > Hi,
> >
> > See ?plotmath
> >
> > An example:
> >
> > x <- 1:10
> > y <- x^2
> >
> > plot(x, y, main = expression(paste("Plot of ", y %<-% x^2)))
> >
> >
> > There are other incantations and examples on the help page above.
> >
> > Regards,
> >
> > Marc Schwartz
> >
>
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