Try something like
. kdensity cmeasurem if cohab==0, at(npointsm) gen(x0 d0) nograph
. kdensity cmeasurem if cohab==1, at(npointsm) gen(x1 d1) nograph
. twoway line d0 x0, sort || line d1 x1, sort
The -sort- option may be omitted if npointsm is sorted.
ben
> -----Original Message-----
> From: [email protected] [mailto:owner-
> [email protected]] On Behalf Of Aim�e R. Dechter
> Sent: Saturday, August 05, 2006 11:22 PM
> To: [email protected]
> Subject: st: Kdensity and the at option to specify values for estimation
>
> Hello,
>
> I would be grateful information on whether it is possible to use the at()
> option with two way kdensity or addplot kdensity?
>
> I get the error message that option at() is not allowed. However, the
> manual indicates that the at(var) option allows one to more easily obtain
> density estimates for different subsamples of a variable and then overlay
> the estimated densities for comparison. You can see below that the n()
> command works but the at() command does not, and I checked that the
> variable I created with the points is above the minimum and below the
> maximum of my measure that I would like to plot. I would be grateful for
> confirmation that the a() does not in fact work with these commands or
> that I am making an error of some sort.
>
> . twoway (kdensity cmeasurem if cohab==0, at(npointsm)) (kdensity
> cmeasurem if
> > cohab==1, at(npointsm))
> option at() not allowed
> invalid syntax
> r(198);
>
> . twoway (kdensity cmeasurem if cohab==0, n(3000)) (kdensity cmeasurem if
> cohab
> > ==1, n(3000))
>
> . kdensity cmeasurem if cohab==0, at(npointsm) addplot( kdensity cmeasurem
> if c
> > ohab==1, at(npointsm))
> option at() not allowed
> invalid syntax
> r(198);
>
> . kdensity cmeasurem if cohab==0, n(3000) addplot( kdensity cmeasurem if
> cohab=
> > =1, n(3000))
>
>
> Thank you very much for taking the time to help me with this.
>
> Aim�e Dechter
>
>
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