[R] Problem in applying if statment

Gabor Grothendieck ggrothendieck at gmail.com
Fri Jun 27 05:58:45 CEST 2008


RSiteSearch("rejection sampling")

On Thu, Jun 26, 2008 at 11:52 PM, Nadeem Shafique
<nadeemshafique at gmail.com> wrote:
> Respected All,
> I am writing a program in R and facing some problem with applying "if statment".
> Program first draw random numbers from bivariate normal distribution
>         then compute variable say Pi and Pij from that sample and
> then further computation
> ......
> .....
> .....
> In some samples Pij is appearing with negitive sign and ultimately
> resulted in an negative variance estimator.  Now i want to design the
> program like this if the Pij is negative then go back and draw another
> sample until we get a sample that produces positive Pij and then move
> forward for further processing.
> Best Regards,
> Nadeem Shafique Butt

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