Reading files
On Sat, Apr 25, 2009 at 2:46 AM, Santosh <santosh2005 at gmail.com> wrote:
Dear R-sians Quick question... 1) From a flat (data) file with 100+ columns, how do I read specific columns instead of reading the entire dataset? I am trying to avoid reading the entire file followed by "subsetting".
In read.table you can use 'col.classes' to define columns to skp.
2) is the a way to a call a column of dataframe through a variable.. e.g.
e,g
var="date"
something like...
data${var} <- "02 Oct 2009?
data[[var]] <- "02Oct 2009"
Regards, santosh ? ? ? ?[[alternative HTML version deleted]]
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