From: Economics Guy <economics.guy_at_gmail.com>

Date: Thu, 13 Mar 2008 13:29:03 -0400

Date: Thu, 13 Mar 2008 13:29:03 -0400

Thanks!

Double thanks to Phil, I used your guide to learn LaTeX many moons ago.

On Thu, Mar 13, 2008 at 1:26 PM, Greg Snow <Greg.Snow_at_imail.org> wrote:

*>
*

> For filenames you can do something like:

*>
**> file = paste("resultsMatrix_', i, sep='')
**>
**> For naming objects in the workspace, there is a way, but you really
**> don't want to do that. It is better to store them in a list, for
**> example:
**>
**> resultList <- list()
**>
**> for( i in 1:10){
**> resultList[[i]] <- matrix(runif(25, 0, 1),5, 5)
**> }
**>
**> If you want the elements of the list named you can do:
**>
**> names( resultList ) <- paste('resultMatrix_',1:10, sep='')
**>
**> Now you have 10 matricies all grouped together in a list, you can access
**> a single matrix like resultList[[1]] or resultList$resultMatrix_1, or
**> you can do something to all of them using lapply or sapply. You are
**> much less likely to overwrite data by accident, you can save, copy,
**> load, delete, etc the whole set in 1 step rather than using a loop.
**>
**> Hope this helps,
**>
**> --
**> Gregory (Greg) L. Snow Ph.D.
**> Statistical Data Center
**> Intermountain Healthcare
**> greg.snow_at_imail.org
**> (801) 408-8111
**>
**>
**>
**>
**>
**> > -----Original Message-----
**> > From: r-help-bounces_at_r-project.org
**> > [mailto:r-help-bounces_at_r-project.org] On Behalf Of Economics Guy
**> > Sent: Thursday, March 13, 2008 11:07 AM
**> > To: r-help_at_stat.math.ethz.ch
**> > Subject: [R] Using loop numbers in write.csv
**> >
**> > This is a question I have wanted to ask for a while but
**> > hesitated because I was sut sure I would find the answer on
**> > my own, but as of yet...no dice.
**> >
**> > 1) Is there a way to use the loop number in naming things in R.
**> > Specifically I have a simulation that has two loops. I would
**> > like to be able to write out the results to a csv file after
**> > each iteration.
**> >
**> > something like:
**> >
**> >
**> > for (i in 1:10){
**> >
**> > exampleMatrix <- matrix(runif(25, 0, 1),5, 5)
**> >
**> > write.csv(exampleMatrix, file = "resultsMatrix_i.csv")
**> >
**> > }
**> >
**> > Where I would get 10 csv files named resultsMatrix_1,
**> > resultsMatrix_2 ... resultsMatrix_10.
**> >
**> >
**> > 2) On a similar note is there a way to use the loop number
**> > when naming things.
**> >
**> > something like:
**> >
**> >
**> > for (i in 1:10){
**> >
**> > exampleMatrix_i <- matrix(runif(25, 0, 1),5, 5)
**> >
**> > }
**> >
**> > Where I would then have 10 matrices in memory with the names
**> > exampleMatrix_1, exampleMatrix_2 ... exampleMatrix_10.
**> >
**> > Thanks,
**> >
**> > EG
**> >
**>
**>
**> > ______________________________________________
**> > R-help_at_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
**> > and provide commented, minimal, self-contained, reproducible code.
**> >
**>
**>
*

-- Robi Ragan Graduate Student Department of Economics Department of Political Science The University of Georgia robi.myweb.uga.edu ______________________________________________ R-help_at_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 and provide commented, minimal, self-contained, reproducible code.Received on Thu 13 Mar 2008 - 17:34:56 GMT

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