[R] embedding expression into title in R plot

[William Dunlap]

I tend to use bquote, as in

  x_label <- bquote(bold(species) ~ (italic(N1)))
  plot(1:10,main=bquote("This is the expression for" ~ .(x_label) * "!"))


Bill Dunlap
TIBCO Software
wdunlap tibco.com

On Mon, Jan 11, 2016 at 7:59 AM, Evan Cooch <evan.cooch at gmail.com> wrote:

> Suppose I've specified that the xlab for a plot is
>
> expression(bold(species~(italic(N1))))
>
> In other words, I want the axis label to be bold, italic 'species (N1)'
>
> Now, I want the title for the plot to be have this label embedded in the
> title.
>
> Say, 'This is the plot for Species (N1)'.
>
> For a variety of reasons, I've set this up so that the xlab is a global
> parameter (basically, because the labels are set in a function which
> when called, generates various plots):
>
> x_label <<- expression(bold(species~(italic(N1))))
>
> So, in the title, I've tried
>
>   title(main=paste("This is the plot for ",x_label,"nullcline", sep=" "));
>
> but what this does is generate something like
>
> 'This is the plot for bold(species~(italic(N1)))'
>
> In other words, it pastes the text of the expression into the title, but
> not what the expression 'evaluates' to.
>
> Is there any way around this?
>
> Thanks in advance...
>
>
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