[R] Question about 'text' (add lm summary to a plot)
Gabor Grothendieck
ggrothendieck at gmail.com
Fri Jul 22 19:16:28 CEST 2005
On 7/22/05, Thomas Lumley <tlumley at u.washington.edu> wrote:
> On Fri, 22 Jul 2005, Dan Bolser wrote:
>
> > On Fri, 22 Jul 2005, Gabor Grothendieck wrote:
> >
> >> Try as.expression(bquote(...whatever...))
> >
> > Sob, wimper, etc.
>
> a<-7
> plot(1)
> legend("topleft",legend=do.call("expression",
> list(bquote(alpha==.(a)),bquote(alpha^2+1==.(a^2+1)))))
>
> works for me. The trick is getting the inner calls to bquote
> evaluated, since expression doesn't evaluate its argument.
I think legend accepts a list argument directly so that could be
simplified to just:
a<-7
plot(1)
L <- list(bquote(alpha==.(a)),bquote(alpha^2+1==.(a^2+1)))
legend("topleft",legend=L)
The same comment seems to apply to my prior suggestion about
as.expression(bquote(...)), namely that one can just write the
following as text also supports a list argument:
my.slope.1 <- 3.22
my.slope.2 <- 0.13
my.inter.1 <- -10.66
my.inter.2 <- 1.96
plot(1:5)
L <- list(
"Intercept:", bquote(.(my.inter.1)%+-%.(my.inter.2)),
"Slope:", bquote(.(my.slope.1)%+-%.(my.slope.2))
)
text(2, c(4,4,4.25,4.25), L, pos = c(2,4,2,4))
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