[R] Novice problems with write()

[Giovanni Petris]

write() also take an `append' argument.

GP

> Date: Tue, 03 Feb 2004 21:39:33 -0500
> From: "Liaw, Andy" <andy_liaw at merck.com>
> Sender: r-help-bounces at stat.math.ethz.ch
> Cc: 
> Precedence: list
> 
> > From: Bret Collier
> > 
> > R-Users,
> >          As a relatively new user of R, I have a quick (and probably 
> > simple) question about using write().  I have a population 
> > simulation that 
> > I am running and I want to output a set of variables for each 
> > run of the 
> > simulation into a text file for use in another program.  
> > However, whenever 
> > I attempt to use write(), the only output that I am able to 
> > get is the 
> > final numbers from the simulation.
> > 
> > for example:
> > 
> > x <- 5
> > for (i in 1:10){
> >   z <- x+i
> > print(z)
> > write(z, "c:/test.txt")
> > }
> 
> What you have done is write 6 through 15 to the file test.txt 10 times, each
> with one number.  write() opens a file, write to it, and then close the
> file, so if you do it in the loop, it would open the file 10 times, write
> one number to it 10 times, and close the file 10 times.
> 
> You're probably looking for something like:
> 
> fout <- file("c:/test.txt", "w")
> x <- 5
> for (i in 1:10) {
>   z <- x + i
>   writeLines(paste(z, "\n"), fout)
> }
> close(fout)
> 
> Or simply:
> 
> write(5 + 1:10, file="c:/test.txt", ncol=1)
> 
> Andy
> 
>  
> > In this simple case,  with print(z) I can see that z has what 
> > I am looking 
> > for, but all that is output for the write statement is 15;  
> > While this is 
> > simplified, it shows my problem.
> > 
> > I searched the help files, and on the R website, but I could not find 
> > anything addressing this.  I suspect that it is my lack of 
> > knowledge and I 
> > am missing something obvious (or should be using 
> > write.table).  If anyone 
> > could point me in the right direction I would appreciate it.
> > 
> > Thanks,
> > 
> > Bret Collier
> > Univ. Arkansas
> > 
> > ______________________________________________
> > R-help at stat.math.ethz.ch mailing list
> > https://www.stat.math.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide! 
> > http://www.R-project.org/posting-guide.html
> > 
> > 
> 
> 
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 __________________________________________________
[                                                  ]
[ Giovanni Petris                 GPetris at uark.edu ]
[ Department of Mathematical Sciences              ]
[ University of Arkansas - Fayetteville, AR 72701  ]
[ Ph: (479) 575-6324, 575-8630 (fax)               ]
[ http://definetti.uark.edu/~gpetris/              ]
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