[R] Delete Columns with zeros

Jens Oldeland
2008-01-31T14:33:20Z

Hi,

I know there have been some discussions on that topic. all their
solutions failed in my case...
My problem is that I have a dataframe with many zeros. but while
plotting they are not useful.
so I want to get rid of column 1,3,4,......,n i have 628 columns 1000
rows, so I can?t look manually for the "empty" columns.

Any possible Ideas?

 > A250[1:5,1:4]

AAPU ACTO ACRA ADBA
A1100 0 0.0 0 0
A20100 0 0.1 0 0
A20200 0 0.0 0 0
A400 0 1.0 0 0
A4100 0 0.0 0 0

I also didn?t find anything useful in "An Introduction to R".

thank you

Jens

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Dipl.Biol. Jens Oldeland
University of Hamburg
Biocentre Klein Flottbek and Botanical Garden
Ohnhorststr. 18
22609 Hamburg,
Germany

Tel:    0049-(0)40-42816-407
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Mail: 	Oldeland at botanik.uni-hamburg.de
        Jens.Oldeland at DLR.de  (for attachments > 2mb!!)
http://www.biologie.uni-hamburg.de/bzf/fbda005/fbda005.htm
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