[R] read.table

[Weiwei Shi]

that sort of works for my purpose.

btw, is there a bettter way to get data.frame by passing around
matrix(). Since I could not find data.frame() with nrow or ncol
arguments. so i have to use matrix first and then as.data.frame to
convert it.

is there any other (better) way?

weiwei

On 7/13/05, Gabor Grothendieck <ggrothendieck at gmail.com> wrote:
> 
> You could use the nlines= argument to scan to read in a 
> portion at a time.
> 
> 
>  
> On 7/13/05, Weiwei Shi <helprhelp at gmail.com> wrote: 
> > 
> > add:
> > I used
> > trn<-matrix(scan('train1.dat',  sep='|', na.string='.'), nrow=273529,
> ncol=195)
> > 
> > it is done.
> > so it seems that I just have no patience to wait for half an hour :)
> > 
> > but i still have that question:
> > is there a way to track the process if it takes too long. Could we
> > stop in the middle to see at which line it "hesitates" to move on? 
> > 
> > regards,
> > 
> > weiwei
> > 
> > 
> > On 7/13/05, Weiwei Shi <helprhelp at gmail.com> wrote:
> > > Hi,
> > > I have a question on read.table.
> > >
> > > I have a dataset with 273,000 lines and 195 columns. I used the 
> > > read.table to load the data into R:
> > > trn<-read.table('train1.dat', header=F, sep='|', na.strings='.')
> > > I found it takes forever.
> > >
> > > then I run 1/10 of the data (test) using read.table again. And this
> > > time it finished quickly. So, there might be something wrong in my
> > > data format causing that problem.
> > >
> > > then, my question is, is there a way in R to track at which line,
> > > something wrong occurs? 
> > >
> > > Thanks,
> > >
> > > Weiwei
> > >
> > >
> > > --
> > > Weiwei Shi, Ph.D
> > >
> > > "Did you always know?"
> > > "No, I did not. But I believed..."
> > > ---Matrix III 
> > >
> > 
> > 
> > --
> > Weiwei Shi, Ph.D
> > 
> > "Did you always know?"
> > "No, I did not. But I believed..."
> > ---Matrix III
> > 
> > ______________________________________________
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> > PLEASE do read the posting guide!
> http://www.R-project.org/posting-guide.html
> > 
> 
>  


-- 
Weiwei Shi, Ph.D

"Did you always know?"
"No, I did not. But I believed..."
---Matrix III