Double inequality with plotmath
Thank you very much Duncan. I see I also had the mistake of a "c" instead of "expression" in my question. Mark
On Fri, Jan 22, 2010 at 7:59 AM, Duncan Murdoch <murdoch at stats.uwo.ca> wrote:
On 21/01/2010 3:50 PM, Mark Seeto wrote:
Hello, I'm fairly new to R and I can't work out how to produce a double inequality like (LaTeX) $0 \leq x \leq 1$ in the legend of a graph. If I try
legend(50, 0.1, legend = c(expression(0 <= x <= 1), c(2 <= x <= 3)), pch = c(1,1), col = c(2, 3))
then I get an error message "unexpected '<=' in ...". I've checked the help files for plotmath and expression, but could not find a solution.
That's not legal R syntax, so you have to cheat. ?For example, legend(50, 0.1, legend = expression(paste(0 <= x) <= 1, paste(2 <= x) <= 3), pch = c(1,1), col = c(2, 3)) Duncan Murdoch