change attributes of all data.frame elements

On Fri, Feb 20, 2009 at 04:12:53PM +0000, Jarrod Hadfield wrote:
I was wondering whether there was an easy way to change the attributes
of all elements in a data.frame (rather than looping through elements)?

Specifically, I would like to set the "dim" attributes to NULL
Maybe I just don't really understand what you are after. The elements
of a data.frame are vectors so by definition they only have one
dimension. Furthermore, they are required to be the same length -
otherwise it wouldn't be a proper data.frame, anymore.
Not so, they can be matrices or even data frames, and 'length' means 
NROW.  But arbitrarily removing dimensions does not seem wise.

In any case, anthing involving elments of a list (and a data frame is 
a list) is ulitimatly a list.

lapply(DF, as.vector)

might be as efficient a way as any to do this.
So I guess you really want to accomplish something I didn't quite
grasp. Could you give an example?
That would be a good idea -- an idea the posting guide has embraced.
cu
	Philipp

-- 
Dr. Philipp Pagel
Lehrstuhl f?r Genomorientierte Bioinformatik
Technische Universit?t M?nchen
Wissenschaftszentrum Weihenstephan
85350 Freising, Germany
http://mips.gsf.de/staff/pagel

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Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
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change attributes of all data.frame elements

Thread (3 messages)