[R] combining expressions in mathplot

From: RICHARD M. HEIBERGER <rmh_at_temple.edu>
Date: Wed, 09 Jun 2010 00:15:19 -0400

Is there a cleaner way of combining two expressions.

This example works and gives what I want

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?

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