[R] Reading very large text files into R

Nick Wray n|ckmwr@y @end|ng |rom gm@||@com
Thu Sep 29 17:26:37 CEST 2022

Hi Bert   Right Thing is, I didn't know that there even was an instruction
like read.csv(text =
"... your text... ")  so at any rate I can paste the original text files in
by hand if there's no shorter cut
Thanks v much Nick

On Thu, 29 Sept 2022 at 16:16, Bert Gunter <bgunter.4567 using gmail.com> wrote:

> I had no trouble reading your text snippet with
> read.csv(text =
> "... your text... ")
> There were 15 columns. The last column was all empty except for the row
> containing the "B".
> So there seems to be some confusion here.
> -- Bert
> On Thu, Sep 29, 2022 at 6:54 AM Nick Wray <nickmwray using gmail.com> wrote:
>> Hello   I may be offending the R purists with this question but it is
>> linked to R, as will become clear.  I have very large data sets from the
>> UK
>> Met Office in notepad form.  Unfortunately,  I can’t read them directly
>> into R because, for some reason, although most lines in the text doc
>> consist of 15 elements, every so often there is a sixteenth one and R
>> doesn’t like this and gives me an error message because it has assumed
>> that
>> every line has 15 elements and doesn’t like finding one with more.  I have
>> tried playing around with the text document, inserting an extra element
>> into the top line etc, but to no avail.
>> Also unfortunately you need access permission from the Met Office to get
>> the files in question so this link probably won’t work:
>> https://catalogue.ceda.ac.uk/uuid/bbd6916225e7475514e17fdbf11141c1
>> So what I have done is simply to copy and paste the text docs into excel
>> csv and then read them in, which is time-consuming but works.  However the
>> later datasets are over the excel limit of 1048576 lines.  I can paste in
>> the first 1048576 lines but then trying to isolate the remainder of the
>> text doc to paste it into a second csv doc is proving v difficult – the
>> only way I have found is to scroll down by hand and that’s taking ages.  I
>> cannot find another way of editing the notepad text doc to get rid of the
>> part which I have already copied and pasted.
>> Can anyone help with a)ideally being able to simply read the text tables
>> into R  or b)suggest a way of editing out the bits of the text file I have
>> already pasted in without laborious scrolling?
>> Thanks Nick Wray
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