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temp1y
2007 Feb 27
1
read.csv size limits
I have been using the read.csv function for a while now without any problems.
My files are usually 20-50 MBs and they take up to a minute to import. They
have all been under 50,000 rows and under 100 columns.
Recently, I tried importing a file of a similar size (which means about the
same amount of data), but with ~500,000 columns and ~20 rows. The process is
taking forever (~1 hour so far). In
2009 Feb 05
2
eliminating control characters from formatted data files
I have a few hundred files of formatted data. Unfortunately most of them end
with a spurious CONTROL-Z. I want to rewrite the files without the spurious
character. Here's what I've come up with so far, but my code is unsafe
because it assumes without justification that the last row of df contains a
control character (and some NAs to fill up the record).
options(warn=-1) #turn off