Add vertical line to kdensity plot

[Taylor Walter]

Hi, I'm trying to overlay two densities and then draw a vertical line at the mean for pop2. I'm getting the density part fine, but can't figure out how to add a line. I was trying to use xline() but it seems as if that doesn't work with kdensity. My code (without all the titles and formatting) is just this:

kdensity pop1, addplot(kdensity pop2)

[Ken Chui]

I am not sure what you meant by "doesn't work with kdensity" (pasting the actual error from Stata would have been helpful). I used this and it seems fine:

kdensity v1, addplot(kdensity v2, xline(0))

[Taylor Walter]

Oh shoot, I just had my syntax wrong--I put the xline after the addplot(). In reading some other examples I thought I interpreted them as saying xline() should only work with twoway. Thank you.

[Nick Cox]

kdensity v1, addplot(kdensity v2) xline(0)

should work too.