[datatable-help] fread suggestion

[stat quant]

Hello list,
We like FREAD because it is very fast, yet sometimes files are huge and R
cannot handle that much data, some packages handle this limitation but they
do not provide a similar to fread function.
Yet sometimes only subsets of a file is really needed, subsets that could
fit into RAM.

So what about adding a grep option to fread that would allow to load only
lines that matches a regular expression?

I'll add a request if you think the idea is worth implementing.

Cheers
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