Re: st: kdensity

[adiallo5@worldbank.org]

I used to:
kdensity X, gen(aa bb) nogr
cumul bb, g(cum_bb)
ksm cum_bb bb
?
If you want the density at each point
you could :
qui cou
local n = r(N)
kdensity X, gen(aa bb) nogr n(`n')
etc...

Amadou DIALLO.



                                                                                                                                               
                      "Branko Milanovic"                                                                                                       
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                      04/22/2005 01:40 PM                                                                                                      
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When you do kdensity X, STATA charts a kernel density fct of X's. Now,
is there a command that would allow me to take the density function thus
generated and chart a cumulative density (or distribution) function?
Ideally, I would like to do that for both densities, that is to go from
a overlay graph

twoway (kdensity X) (kdensity Y)

To a similar overlay graph of two cumulative density functions.

Or is the only way to use:

kdensity X, gen(aa bb)

And then generate a cumulative function of aa? By the way, I tried that
but the graph did not turn out well.

Thanks.

Branko Milanovic




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