Lars,
Here is one way to produce circles:
twoway (function y = sqrt(9-x*x), xlabel(-3(.5)3) range(-3 3)
clstyle(refline) ylabel(-3(.5)3, nogrid)) ///
|| (function y = -1*sqrt(9-x*x),legend(off) range(-3 3)
clstyle(refline)) ///
|| (function y = sqrt(4-x*x), legend(off) range(-2 2)
clstyle(refline)) ///
|| (function y = -1*sqrt(4-x*x),legend(off) range(-2 2)
clstyle(refline)) ///
|| (function y = sqrt(1-x*x), legend(off) range(-1 1)
clstyle(refline)) ///
|| (function y = -1*sqrt(1-x*x),legend(off) range(-1 1)
clstyle(refline) aspect(1))
Hope this helps,
Scott
> -----Original Message-----
> From: [email protected] [mailto:owner-
> [email protected]] On Behalf Of Lars Korsholm
> Sent: Tuesday, August 24, 2004 8:16 AM
> To: [email protected]
> Subject: st: vecstable graph ?
>
> Hi
>
> Reading the stata news vol 19 no 3
> on front page I see a nice graph
> I think created with
> ...
> vecstable, graph
>
> I wounder how the circular curves in the background is created.
> Does anyone knows?
>
> (I could not myself decifrate the adofiles ;-)
>
> Best Lars
>
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