[R] Male and female signs as subscript in plot

Hello, I'd like to add labels to my plot that include a male or female symbol as subscript. I'm working in Windows Vista and R 3.0.0. I am able to add the male symbol to the plot as regular text (NOT as subscript), e.g. with: mtext("Male\u2642") This displays the word "Male" followed by the male s

[R] Equation as a character string

I'm trying to figure out if it's possible to use a character string as an equation, e.g: eqn1string <- "x^2 + x + 5" Then I want to tell R: 1) that eqn1string is actually an equation (even though it was stored as a character string), and 2) to apply the equation to a specified value of x (e.g. g