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

[Michael Friendly]

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 <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.
>>>
>>
> 
> 	[[alternative HTML version deleted]]
>