Why do you need it to be a matrix? A data.frame is like a matrix, but
allows columns of mixed types.
as.matrix() will coerce your data frame to a matrix if you really need this.
On 7/08/19 4:43 p.m., Spencer Brackett wrote:
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 <ruipbarra...@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.tho...@utoronto.ca>
wrote:
On Jul 8, 2019, at 10:06 AM, Spencer Brackett <
spbracket...@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.
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--
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.tho...@utoronto.ca Tel: 416.864.5776 Fax: 416.864.3016
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