R help - Jun 2010 - combining expressions in mathplot

Is there a cleaner way of combining two expressions.

This example works and gives what I want

plot(1:10)
aa <- expression(alpha==.05)
bb <- expression(beta ==.80)
aabb <- expression(alpha==.05 ~ ", " ~ beta ==.80)

text(5, 10, aa)
text(5,  9, bb)
text(5,  8, aabb)

text(5,1, parse(text=paste(deparse(aa[[1]]), deparse(bb[[1]]),
sep="~")))
text(5,2, parse(text=paste(deparse(aa[[1]]), deparse(bb[[1]]), sep="~',
'~")))

Is there a cleaner way of combining the expressions aa and bb  to get the
effect of the last two lines?

	[[alternative HTML version deleted]]

On Wed, 9 Jun 2010 00:15:19 -0400,
"RICHARD M. HEIBERGER" <rmh at temple.edu> wrote:
> text(5,1, parse(text=paste(deparse(aa[[1]]), deparse(bb[[1]]),
> sep="~"))) text(5,2, parse(text=paste(deparse(aa[[1]]),
> deparse(bb[[1]]), sep="~', '~")))
> Is there a cleaner way of combining the expressions aa and bb to get
> the effect of the last two lines?
How about:

aa <- 0.05; bb <- 0.80
text(5, 1, bquote(alpha==.(aa) ~~ beta==.(bb)))

?plotmath

-- 
Seb

On 09.06.2010 06:15, RICHARD M. HEIBERGER wrote:
> Is there a cleaner way of combining two expressions.
>
> This example works and gives what I want
>
> plot(1:10)
> aa<- expression(alpha==.05)
> bb<- expression(beta ==.80)
> aabb<- expression(alpha==.05 ~ ", " ~ beta ==.80)
>
> text(5, 10, aa)
> text(5,  9, bb)
> text(5,  8, aabb)
>
> text(5,1, parse(text=paste(deparse(aa[[1]]), deparse(bb[[1]]),
sep="~")))
text(5, 1, substitute(a ~ b, list(a=aa[[1]], b=bb[[1]])))

> text(5,2, parse(text=paste(deparse(aa[[1]]), deparse(bb[[1]]),
sep="~',
> '~")))
text(5, 1, substitute(a ~"'"~ b, list(a=aa[[1]], b=bb[[1]])))

Uwe



> Is there a cleaner way of combining the expressions aa and bb  to get the
> effect of the last two lines?
>
> 	[[alternative HTML version deleted]]
>
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