. help mathfun
indicates some functions with bounded range.
Then use some linear re-expression to suit.
2 * invlogit(x) - 1
maps to (-1,1). Now tell me that it _really_
has to be [-1,1] not (-1,1)....
Nick
[email protected]
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]]On Behalf Of
> D.Christodoulou
> Sent: 05 August 2004 14:23
> To: [email protected]
> Subject: Re: st:normal linear (mis)scaling
>
>
> Nick,
>
> thanks for your reply. In the same sense I can use:
> - histogram normal if normal >= -0.2 | normal <=-0.8 -
> to remove the exact bit that I want.
>
> However, it is essential for this distribution to have bounds in the
> interval [-1,1].
> How to I restrict the random observations to be generated into this
> interval.
>
> thanks again,
> Dimitris
>
> Nick Cox wrote:
> >
> > I would generate lots of values from a Gaussian
> > and then take a big bite out of it, with some
> > randomness about the biting.
> >
> > . set obs 1000
> > . gen normal = invnorm(uniform())
> > . qnorm normal
> > . histogram normal if (abs(normal) * uniform()) > 0.5
> > . histogram normal if (abs(normal) * uniform()) > 0.6
> >
> > Nick
> > [email protected]
> >
> > D.Christodoulou
> > >
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