[R] why is text being rasterized with text()

From: Andrew Yee <yee_at_post.harvard.edu>
Date: Thu, 03 Apr 2008 01:10:35 -0400

Here's a question: I noticed that when I tried to create this simple graph of rectangles and text, R appears to generate text that is rasterized (this is seen both on the monitor and when the output is directed to a pdf file). Any thoughts?

value.seq <- c("<4",as.character(seq(from=4,to=10)),">11") frame()
par(usr=c(0,10,0,10) )

for (r in 1:9) {

rect(r,3,r+1,3.75, border = NA, col=heat.colors(9)[r])

#this text does not appear to be rasterized

   text(r+0.5,2.75, value.seq[r], cex=0.5)

#this text appears to be rasterized

   text(5.5,2.25,"expression (log2)", cex=0.5) }


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