[R] Monte Carlo Simulation
izahn at psych.rochester.edu
Fri Apr 15 21:04:01 CEST 2011
See ?rbinom, ?rnorm, ?mvrnorm (in the MASS package), ?sample, ?for and
On Fri, Apr 15, 2011 at 2:49 PM, Shane Phillips
<SPhillips at lexington1.net> wrote:
> Hello, R friends...
> I am very new to R, and I need some help. I am trying to construct a simulation for my dissertation.
> I need to create 1000 datasets of 1000 subjects with the following variables...
> Treatment variable - Drawn from a binomial distribution (1 run, prob=.13)
> Covariate 1 - Drawn from a normal distribution (mean=100, sd=16)
> Covariate 2 - Drawn from a normal distribution (mean=200, sd=9)
> Covariates 1 and 2 need to be correlated (say, r=.80)
> Covariate 3 - Drawn from a binomial distribution (1 run, prob=.5)
> Covariate 4 - Drawn from a distribution of discrete variables where 1 has an 80% chance of being selected, 2 - 10%, 3 - 5% and 4 - 5%. This variable would need to be recoded into 4 binary variables.
> Covariate 5 - Drawn from a normal distribution (mean=84, sd=2)
> Covariate 6 - Drawn from a binomial distribution (1 run, prob=.15)
> Covariate 6 needs to correlate with Covariate 2 (r=.70, or so)
> I need each dataset saved as a new datafile with an iterative filename (e.g. sample1, sample2, etc.).
> Please help!
> R-help at r-project.org mailing list
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
University of Rochester
Department of Clinical and Social Psychology
More information about the R-help