[R] output of "for"

[Greg Snow]

Look at the collapse argument to the paste function.  You should be able to do what you want much simpler without any explicit for loops.

-- 
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 Matteo Mattiuzzi
> Sent: Wednesday, October 28, 2009 11:28 AM
> To: R-help at r-project.org
> Subject: [R] output of "for"
> 
> Hello!
> 
> I've got troubles on following thing:
> 
> As output I need a string like:
> INPUT_FILENAMES =
> H:\\AKK_temp\\Modis\\MOD13Q1\\austria\\MOD09Q1.A2008073.h18v04.005.2008
> 083134952.hdf|H:\\AKK_temp\\Modis\\MOD13Q1\\austria\\MOD09Q1.A2008073.h
> 19v04.005.2008082182221.hdf
> The filenames (dates) are with pathname (wrkdr) and separated with "|".
> The number of input filenames changes (minimum 1, maximum n)
> 
> wrkdr  <- "H:\\akk_temp\\Modis\\MOD09"
> dates  is a data.frame where each row is a date and each column is a
> Modis-image (the name of it)
> 
> I did this as following:
> paste('INPUT_FILENAMES = ', for(g in 1:(ntiles-1))
> {paste(wrkdr,'\\',dates[i,g+1],'|',sep='')} , for(g in ntiles){
> paste(wrkdr,'\\',dates[i,g+1],sep='') } ,sep='')
> 
> ....and this did work (in an other "wrkdr" and other "dates") but after
> changing, "for" gave no more output. And I don't know why!!!
> 
> Why i use "for" twice? Because after the last file there is no "|"...
> 
> 
> Thanks for help
> 
> Matteo
> 
> 
> 
> 
> 
> 
> 
> 
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> 
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