[R] Using options(max.print = 1000000) to read in data

[Spencer Brackett]

Using str(GBM.txt) produced the same output as last time, which lists the
number of objects acting on a particular number of variables for the said
dataset and a few rows read from the original file.

The result of class(GBM.txt) generates the following..

> class(GBM.txt)
[1] "data.frame"

Is this to say that the object is set as a 'data frame', opposed to a
'matrix' ?

I will try running ?is.matrix now



On Mon, Jul 8, 2019 at 10:33 AM Rui Barradas <ruipbarradas using sapo.pt> wrote:

> Hello,
>
> Inline.
>
> Às 15:26 de 08/07/19, Spencer Brackett escreveu:
> > Thank you,
> >
> > Here is a summary of the resulting output....
> >
> >> nrow(GBM.txt)
> > [1] 20530
> >> ncol(GBM.txt)
> > [1] 173
> >
> > This corresponds with the info found in my global environment for the
> > object indicated. Now, how do I go about determining if the dataset is a
> > matrix?
>
> Try any of
>
> str(GBM.txt)
> class(GBM.txt)
>
> Also, like Kevin said, max.print only affects how much is printed, not
> the read functions. Why change max.print at all? The default value
> (1000) is large enough, I have never needed to see more than this at a
> time. In fact, to have an idea of the data I would rather further limit
> the number of matrix lines printed with
>
> head(object)
> tail(object)
>
>
>
> Hope this helps,
>
> Rui Barradas
> >
> >
> > On Mon, Jul 8, 2019 at 10:16 AM Kevin Thorpe <kevin.thorpe using utoronto.ca>
> > wrote:
> >
> >>
> >>> On Jul 8, 2019, at 10:06 AM, Spencer Brackett <
> >> spbrackett20 using saintjosephhs.com> wrote:
> >>>
> >>> Hello,
> >>>
> >>>   I am trying to reload some data into R in order to check to see if
> it is
> >>> formatted as a matrix. I used the command options(max.print = 10000000)
> >> to
> >>> account for the 20,000 some rows omitted previously when just using the
> >>> basic version of this function. After entering this command, the
> dataset
> >>> mostly loaded into R, but 14717 rows were still omitted.
> >>>
> >>>   Can I simply increase the number indicted after 'max.print =' to
> read in
> >>> the remaining rows, or should I use 'bigfile.sample <-' or
> >>> 'bigfile.colclass <-' instead? Do I even need to read in all of the
> rows
> >> to
> >>> test for a matrix?
> >>>
> >>> Best,
> >>>
> >>> Spencer
> >>>
> >>
> >> I don’t think this option affects how much data is read in, just how
> much
> >> is printed to the screen. Use the function str() on your imported
> object to
> >> see how many rows, among other things, were brought in.
> >>
> >>
> >>>        [[alternative HTML version deleted]]
> >>>
> >>> ______________________________________________
> >>> R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
> >>> 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.
> >>
> >>
> >> --
> >> Kevin E. Thorpe
> >> Head of Biostatistics,  Applied Health Research Centre (AHRC)
> >> Li Ka Shing Knowledge Institute of St. Michael's
> >> Assistant Professor, Dalla Lana School of Public Health
> >> University of Toronto
> >> email: kevin.thorpe using utoronto.ca  Tel: 416.864.5776  Fax: 416.864.3016
> >>
> >>
> >
> >       [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
> > 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.
> >
>

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