plotting two curves on same chart

[Alan Jeddi]

Hello
I have two distributions of my dependent variable 'gcp', one for males and one for females.
I would like to plot their distributions on the same chart...
I don't think the hist options are good for this, as I don't actually want to plot the frequency / density in a proper histogram with bars (eg 'hist gcp'), I just want the overarching curve for each of them....

Can anybody help?

[Rich Goldstein]

try -kdensity- with the addplot option for a second -kdensity-; see

help kdensity

[Nick Cox]

help kdensity

may be the pointer you seek. Otherwise "overarching curve" could mean several different things.

[Alan Jeddi]

help kdensity

may be the pointer you seek. Otherwise "overarching curve" could mean several different things.

Hi there,
sorry, I guess what I meant is that I want the equivalent of a smoothed distribution of my data overlying my histogram, without the histogram itself.
Basically, something exactly like this:

I ran the code "kdensity gcp if sex==0, addplot(kdensity gcp if sex==1) but this does not seem to be working. I get the error message, "invalid addplot". Do you have any pointers?

[Nick Cox]

Works for me:

. sysuse auto
(1978 Automobile Data)

. kdensity mpg if foreign, addplot(kdensity mpg if !foreign)

So, I have to guess that your code is not what you said, or that your Stata is not up-to-date. You don't give a data example for us to test your code.