Displaying 3 results from an estimated 3 matches for "ndjon".
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ndjson
2017 Sep 03
2
readLines() segfaults on large file & question on how to work around
...l.com>
> wrote:
> > I have a 2.1GB JSON file. Typically I use readLines() and
> > jsonlite:fromJSON() to extract data from a JSON file.
>
> If your data consists of one json object per line, this is called
> 'ndjson'. There are several packages specialized to read ndjon files:
>
> - corpus::read_ndjson
> - ndjson::stream_in
> - jsonlite::stream_in
>
> In particular the 'corpus' package handles large files really well
> because it has an option to memory-map the file instead of reading all
> of its data into memory.
>
> If t...
2017 Sep 02
5
readLines() segfaults on large file & question on how to work around
Hi:
I have a 2.1GB JSON file. Typically I use readLines() and
jsonlite:fromJSON() to extract data from a JSON file.
When I try and read in this file using readLines() R segfaults.
I believe the two salient issues with this file are
1). Its size
2). It is a single line (no line breaks)
I can reproduce this issue as follows
#Generate a big file with no line breaks
# In R
>
2017 Sep 04
0
readLines() segfaults on large file & question on how to work around
...te:
>>> I have a 2.1GB JSON file. Typically I use readLines() and
>>> jsonlite:fromJSON() to extract data from a JSON file.
>>
>> If your data consists of one json object per line, this is called
>> 'ndjson'. There are several packages specialized to read ndjon files:
>>
>> - corpus::read_ndjson
>> - ndjson::stream_in
>> - jsonlite::stream_in
>>
>> In particular the 'corpus' package handles large files really well
>> because it has an option to memory-map the file instead of reading all
>> of i...