[datatable-help] fread(character string) limited to strings less than 4096 long?

[Matthew Dowle]

Interesting, what's your sessionInfo() please? 

For me it seems to
work ok : 

[1] 1022
[1] 1023
[1] 1024 
[1] 9999

> sessionInfo()
R
version 2.15.2 (2012-10-26)
Platform: x86_64-w64-mingw32/x64
(64-bit)

On 27.03.2013 22:49, Timothée Carayol wrote: 

> Agree with
Muhammad, longer character strings are definitely permitted in R. 
> A
minimal example that show something strange happening with fread: 
> 
>
for (n in c(1023:1025, 10000)) { 
> A 
> paste( 
> rep('atbn', n), 
>
collapse='' 
> ), 
> sep='t' 
> ) 
> print(nrow(A)) 
> } 
> On my
computer, I obtain: 
> 
> [1] 1022 
> [1] 1023 
> [1] 1023 
> [1] 1023

> Hope this helps 
> Timothée 
> 
> On Wed, Mar 27, 2013 at 9:23 PM,
Matthew Dowle <mdowle at mdowle.plus.com [3]> wrote:
> 
>> Hi,
>> Nice to
hear from you. Nope not known to me. Obviously 4096 is 4k, is that
>>
the R limit for a character string length? What happens at 4097?
>>
Matthew
>> 
>> > Hi,
>> >
>> > I have an example of a string of 4097
characters which can't be parsed by
>> > fread; however, if I remove any
character, it can be parsed just fine. Is
>> > that a known
limitation?
>> >
>> > (If I write the string to a file and then fread
the file name, it works
>> > too.)
>> >
>> > Let me know if you need the
string and/or a bug report.
>> >
>> > Thanks
>> > Timothée >
_______________________________________________
>> > datatable-help
mailing list
>> > datatable-help at lists.r-forge.r-project.org [1]
>> >
https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/datatable-help
[2]

 

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