From: sigalit mangut-leiba <smangut@gmail.com>
Date: Nov 15, 2007 3:24 PM
Subject: Re: [R] a repetition of simulation
To: r-help <r-help@stat.math.ethz.ch>

Hello,
In addition to my question a few days ago,
Now I have a matrix of the coefficients,
how can I see all the P.Values ( Pr(>|z|)) of the covariates from the 1000
iterations?
I tried names(log_v) and couldn'n find it.
Thank you,
 Sigalit.


On 11/13/07, Julian Burgos <jmburgos@u.washington.edu> wrote:
>
> Well, the obvious (but perhaps not the most elegant) solution is put
> everything in a loop and run it 600 times.
>
> coefficients=matrix(NA,ncol=3,nrow=600)
>
> for (loop in 1:600){
>
> [all your code here]
>
> coefficients[loop,]=coef(log_v)
>
> }
>
> That will give you a matrix with the coefficients of each model run in
> each row.
>
> Julian
>
>
> sigalit mangut-leiba wrote:
> > I want to repeat the simulation 600 times and to get a vector of 600
> > coefficients for every covariate: aps and tiss.
> > Sigalit.
> >
> >
> > On 11/13/07, Julian Burgos <jmburgos@u.washington.edu> wrote:
> >> And what is your question?
> >>
> >> Julian
> >>
> >> sigalit mangut-leiba wrote:
> >>> Hello,
> >>> I have a simple (?) simulation problem.
> >>> I'm doing a simulation with logistic model and I want to reapet it 600
> >>> times.
> >>> The simulation looks like this:
> >>>
> >>> z <- 0
> >>> x <- 0
> >>> y <- 0
> >>> aps <- 0
> >>> tiss <- 0
> >>> for (i in 1:500){
> >>> z[i] <- rbinom(1, 1, .6)
> >>> x[i] <- rbinom(1, 1, .95)
> >>> y[i] <- z[i]*x[i]
> >>> if (y[i]==1) aps[i] <- rnorm(1,mean=13.4, sd=7.09) else aps[i] <-
> >>> rnorm(1,mean=12.67, sd=6.82)
> >>> if (y[i]==1) tiss[i] <- rnorm(1,mean= 20.731,sd=9.751) else  tiss[i]
> <-
> >>> rnorm(1,mean=18.531,sd=9.499)
> >>> }
> >>> v <- data.frame(y, aps, tiss)
> >>> log_v <- glm(y~., family=binomial, data=v)
> >>> summary(log_v)
> >>>
> >>> I want to do a repetition of this 600 times (I want to have 600
> logistic
> >>> models), and see all the coefficients of the covariates aps & tiss.
> >>> Thanks in advance,
> >>> Sigalit.
> >>>
> >>>       [[alternative HTML version deleted]]
> >>>
> >>> ______________________________________________
> >>> R-help@r-project.org mailing list
> >>> https://stat.ethz.ch/mailman/listinfo/r-help
> >>> PLEASE do read the posting guide
> >> http://www.R-project.org/posting-guide.html<http://www.r-project.org/posting-guide.html>
> >>> and provide commented, minimal, self-contained, reproducible code.
> >>
> >
> >       [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > R-help@r-project.org mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html<http://www.r-project.org/posting-guide.html>
> > and provide commented, minimal, self-contained, reproducible code.
>
>

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