[R] Using bquote: question

[Schools Statistics Poster Competition]

Hi all

Observe:

x <- c(1,2)
y <- c(1,-1)

phi <- 1
p <- 2

par( mfrow=c(1,2))
plot(x , y, main=bquote( paste( p==.(p)," and ",phi==.(phi)) ) )
plot(y ~ x, main=bquote( paste( p==.(p)," and ",phi==.(phi)) ) )
par( mfrow=c(1,2))


On my system (details below), the first plot is correct (in my 
understanding), and produces a title reading "p=2 and phi=1" (with 
appropriate Greek for phi).

However, the second produces the title "TRUE and TRUE".

Is this a bug, or a misunderstanding or my part(in which case, I'm 
sure I'll be told the obscure location where this is documented!)?

Thanks.

P.


> sessionInfo()
R version 2.6.0 (2007-10-03)
i486-pc-linux-gnu

locale:
LC_CTYPE=en_AU.UTF-8;LC_NUMERIC=C;LC_TIME=en_AU.UTF-8;LC_COLLATE=en_AU.UTF-8;LC_MONETARY=en_AU.UTF-8;LC_MESSAGES=en_AU.UTF-8;LC_PAPER=en_AU.UTF-8;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=en_AU.UTF-8;LC_IDENTIFICATION=C

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

other attached packages:
[1] tweedie_1.5.3 statmod_1.3.0

loaded via a namespace (and not attached):
[1] rcompgen_0.1-15
>


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