use the 'colClasses' argument and you can also set 'nrows'.
b
On Sep 23, 2009, at 8:24 PM, Ping-Hsun Hsieh wrote:
Hi,
I am trying to read a tab-delimited file into R (Ver. 2.8). The
machine I am using is 64bit Linux with 16 GB.
The file is basically a matrix(~600x700000) and as large as 3GB.
The read.delim() ran extremely slow (hours) even with a subset of
the file (31 MB with 6x700000)
I monitored the memory usage, and found it constantly only took less
than 1% of 16GB memory.
Does read.delim() have difficulty to read files with lots of columns?
Any suggestions?
Thanks,
Mike
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