# Simulation study in R Classic List Threaded 4 messages Open this post in threaded view
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## Simulation study in R

 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, ______________________________________________ [hidden email] mailing list https://stat.ethz.ch/mailman/listinfo/r-helpPLEASE do read the posting guide http://www.R-project.org/posting-guide.htmland provide commented, minimal, self-contained, reproducible code.
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## Re: Simulation study in R

 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 <[hidden email]> 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, > > ______________________________________________ > [hidden email] mailing list > 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. > ______________________________________________ [hidden email] mailing list https://stat.ethz.ch/mailman/listinfo/r-helpPLEASE do read the posting guide http://www.R-project.org/posting-guide.htmland provide commented, minimal, self-contained, reproducible code.