Re: [R] Simulation study in R

From: Moshe Olshansky <m_olshansky_at_yahoo.com>
Date: Tue, 29 Apr 2008 17:04:49 +1000 (EST)


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.

> 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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>



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https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Tue 29 Apr 2008 - 07:18:27 GMT

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