Re: [R] Columnwise Alternate Subsetting of a Data Frame

From: Charles C. Berry <cberry_at_tajo.ucsd.edu>
Date: Sun, 22 Jun 2008 20:38:28 -0700

See

         ?split

help.search() is (or should be) your friend.

HTH, Chuck

On Mon, 23 Jun 2008, Gundala Viswanath wrote:

> Hi,
>
> Given this data frame:
>
>> print(repo.dat)
> V1 V2 V3 V4
> V5 .... (can be more)
> 1 1007_s_at DDR1 2865.1 2901.3 1978.3 300.2
> 2 1053_at RFC2 103.6 81.6 108.0 101.3
>
> I want to split them into two data frames yielding:
>
> V1 V2 V3 ... etc
> 1 1007_s_at DDR1 2865.1 1978.3
> 2 1053_at RFC2 103.6 108.0
>
> (V2 and V3 is obtain from V2 and V4 of original repo.dat)
>
> and
>
> V1 V2 V3 ...etc
> 1 1007_s_at DDR1 2901.3 300.2
> 2 1053_at RFC2 81.6 101.3
>
>
> (V2 and V3 is obtain from V3 and V5 of original repo.dat)
>
> In principle what we desire to do is to:
> 1. Given original data frame with V1, V2, V3, V4....
> 2. Split the data frame into two based on V2,V4,V6 ... (even) and V3,
> V5, V7 ..(odd) in the original data frame
> 3. Meanwhile keep row names and V1 in two newly formed data frames.
>
> Is there a compact way to do it?
>
> - Gundala Viswanath
> Jakarta - Indonesia
>
> ______________________________________________
> R-help_at_r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

Charles C. Berry                            (858) 534-2098
                                             Dept of Family/Preventive Medicine
E mailto:cberry_at_tajo.ucsd.edu	            UC San Diego
http://famprevmed.ucsd.edu/faculty/cberry/ La Jolla, San Diego 92093-0901

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https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Mon 23 Jun 2008 - 03:41:02 GMT

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