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
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