[R] Question concerning Loading large Data Sets

David Winsemius
Sun, 05 May 2019 23:26:10 -0000

I wouldn?t have expected an message, but it does raise the question: why are you
making two different copies of the same text file if you are concerned about
size issues?

?
David

Sent from my iPhone

> On May 5, 2019, at 5:14 PM, Spencer Brackett <spbrackett20 at
saintjosephhs.com> wrote:
>
> Also,
>
> In case there is any confusion... "~/Vakul's GBM code" was
set up in the
> working directory (via setwd) as the folder in which the file
'mapper.txt'
> is contained... thereby making the "~/Vakul's GBM
code/mapper.txt" as
> shown.
>
> Should I perhaps reset my working directory to the file I'm trying to
> access, exclusively?
>
> On Sun, May 5, 2019 at 7:09 PM Spencer Brackett <
> spbrackett20 at saintjosephhs.com> wrote:
>
>> Good evening,
>>
>> I am attempting to reproduce the following lines of code...
>>
>> library(data.table)
>> anno = as.data.frame(fread(file = "file name", sep
="\t", header = T))
>>
>>
>> The following is my attempt...
>>
>>> library(data.table)
>>> mapper <- read.delim("~/Vakul's GBM
code/mapper.txt")
>>>  View(mapper)
>> ## fread() was used as datset is quite large ##
>>> GBM_meth <- fread("~/Vakul's GBM code/mapper.txt")
>>> anno = as.data.frame(fread(file = "~/Vakul's GBM
code/mapper.txt", sep
>> ="\t", header = T))
>>
>> Via View(mapper), I can view the dataset contained within the
"mapper.txt"
>> file, but the >anno = as.data.frame portion does not trigger any
sort of
>> 'response' on R and simply brings my cursor down to the next
line, ready
>> for further implementation. Should I be getting some sort of output
from R,
>> and if so what should I expect?
>>
>> I apologize in advance for any errors in the summary of the above
script
>>
>> Best,
>>
>> Spencer Brackett
>>
>
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>
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