Personal tricks in R

TC

2017/05/15

Categories: r Tags: notes

Live Dangerously.

Problem

I ran into a strange problem today. From a deep buried memory I remember that R supports import from compressed gzip files.

So I compressed a tab file(MAF file, ~ 1.5G ) and tried to read it using fread and read.table.

And it turns out to be a missing option quote="\"" in the command read.table.

Summary:

fread from data.table doesn’t support compressed files yet. But It’s super smart to figure all annoying I/O problems in R.

And it’s superfast.

The vanilla read.table requires carefully configured options. A day ruiner if you didn’t pay enough attention.

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