# [R] Simulation study in R

Arun Kumar Saha arun.kumar.saha at gmail.com
Tue Apr 29 09:21:28 CEST 2008

```x, y are cont. variable, and f also have to be cont.. And your second
suggestion is correct of course, it actually should be |f(x,y) - c| <
epsilon

Thanks

On Tue, Apr 29, 2008 at 12:34 PM, Moshe Olshansky <m_olshansky at yahoo.com> wrote:
> Are the pairs (x,y) belong to some lattice or can
> change continuously?
> Does f assume some discrete values (or is constant on
> sets of positive measure)? If not then it will be hard
> to randomly select x and y which satisfy the exact
> equality (this still can happen since there are
> finitely many computer numbers, but their number is
> quite large!). So if f change continuously you may
> need the condition |f(x,y) - c| < epsilon for some
> epsilon > 0.
>
> Regards,
>
> Moshe.
>
>
> --- Arun Kumar Saha <arun.kumar.saha at gmail.com> wrote:
>
> > Here I am in a simulation study where I want to find
> > different values
> > of x and y such that f(x,y)=c (some known constant)
> > w.r.t. x, y >0,
> > y<=x and x<=c1 (another known constant). Can anyone
> > please tell me how
> > to do it efficiently in R. One way I thought that I
> > will draw
> > different random numbers from uniform dist according
> > to that
> > constraints and pick those which satisfy f(x,y)=c.
> > However it is not I
> > think computationally efficient. Can anyone here
> > suggest me any other
> > efficient approach?
> >
> > Regards,
> >
> > ______________________________________________
> > R-help at r-project.org mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > http://www.R-project.org/posting-guide.html
> > and provide commented, minimal, self-contained,
> > reproducible code.
> >
>
>

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