Greetings,
I have a problem that I am sure is very straightforward, but I just
can't wrap my head around it. I've read the help pages on text,
plotmath, expression, substitute, but somehow I can't find the answer
to this simple question.
Basically consider the following example:
plot( NULL, xlim = c(0,2), ylim = c(0,2) )
expressions <- expression( -infinity, infinity )
text( c(0.5,1.5), 1.5, expressions )
labels <- c( "-infinity", "infinity" )
text( c(0.5,1.5), 0.5, as.expression(labels) )
I want the character vector "labels" to be interpreted as an
expression vector, and so to appear just like the expressions vector.
Is this possible? I mean yes, it is probably possible, but how?
I suppose the problem is that the result of as.expression(labels) is
expression("-infinity", "infinity") instead of expression(-infinity,
infinity), as I would have liked. I just can't figure out how to
convert it to the right thing.
Haris
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