[R] Simulation study in R

[Moshe Olshansky]

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,
> 
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