Date: Tue, 29 Jun 1999 14:58:10 +0200
Message-Id: <199906291258.OAA10869@sophie.ethz.ch>
From: Martin Maechler <maechler@stat.math.ethz.ch>
To: R-help@stat.math.ethz.ch
Subject: [R] text-plotting math & regular mixed ?
Maybe embarassing, but I can't quickly find out how to do this:
Mix expression() text and regular text __in a variable__ for plotting:
I can easily do
plot(1,type="n",main=expression(paste("Plot of ", x ^ alpha, "; ", alpha==2.3)
However, if alpha is really just in a variable, I don't know what to do
alpha <- 2.3
ch.a <- format(alpha)
and now do the above but only use `ch.a' ?
i.e., can you ``fix'' the following function ?
p.ex <- function(alpha = .05) {
x <- seq(0,1, len=101)
ch.a <- formatC(alpha,wid=1)
plot(x, x^alpha, main=
expression(paste("Power plot of ", x ^ alpha, " for ", alpha == {})))
## Where can I pass ch.a ??
invisible()
}
Martin Maechler <maechler@stat.math.ethz.ch> http://stat.ethz.ch/~maechler/
Seminar fuer Statistik, ETH-Zentrum SOL G1; Sonneggstr.33
ETH (Federal Inst. Technology) 8092 Zurich SWITZERLAND
phone: x-41-1-632-3408 fax: ...-1086 <><
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