[R] average duplicated rows?

[Pieter Schoonees]

You will have to split() the data and unsplit() it after making the alterations. Have a look at the plyr package for such functions.

> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of Vining, Kelly
> Sent: Friday 12 October 2012 5:42
> To: r-help at r-project.org
> Subject: [R] average duplicated rows?
> 
> Dear useRs,
> 
> I have a slightly complicated data structure and am stuck trying to
> extract what I need. I'm pasting an example of this data below. In some
> cases, there are duplicates in the "gene_id" column because there are
> two different "sample 1" values for a given "sample 2" value. Where
> these duplicates exist, I need to average the corresponding "FL_EARLY"
> values and retain the "FL_LATE" value and replace those two rows with a
> row containing the "FL_EARLY" average so that I no longer have any
> "gene_id" duplicates.
> 
> Seems like this is a job for some version of the apply function, but
> searching and puzzling over this has not gotten me anywhere. Any help
> will be much appreciated!
> 
> Example data:
> 
> 
>              gene_id sample_1 sample_2   FL_EARLY  FL_LATE
> 763938  Eucgr.A00054   fl_S1E   fl_S1L  13.170800  22.2605
> 763979  Eucgr.A00101   fl_S1E   fl_S1L   0.367960  14.1202
> 1273243 Eucgr.A00101    fl_S2   fl_S1L   0.356625  14.1202
> 764169  Eucgr.A00350   fl_S1E   fl_S1L   7.381070  43.9275
> 1273433 Eucgr.A00350    fl_S2   fl_S1L  10.674500  43.9275
> 1273669 Eucgr.A00650    fl_S2   fl_S1L  33.669100  50.0169
> 764480  Eucgr.A00744   fl_S1E   fl_S1L 132.429000 747.2770
> 1273744 Eucgr.A00744    fl_S2   fl_S1L 142.659000 747.2770
> 764595  Eucgr.A00890   fl_S1E   fl_S1L   2.937760  14.9647
> 764683  Eucgr.A00990   fl_S1E   fl_S1L   8.681250  48.5492
> 1273947 Eucgr.A00990    fl_S2   fl_S1L  10.553300  48.5492
> 764710  Eucgr.A01020   fl_S1E   fl_S1L   0.000000  57.9273
> 1273974 Eucgr.A01020    fl_S2   fl_S1L   0.000000  57.9273
> 764756  Eucgr.A01073   fl_S1E   fl_S1L   8.504710 101.1870
> 1274020 Eucgr.A01073    fl_S2   fl_S1L   5.400010 101.1870
> 764773  Eucgr.A01091   fl_S1E   fl_S1L   3.448910  15.7756
> 764826  Eucgr.A01152   fl_S1E   fl_S1L  69.565700 198.2320
> 764831  Eucgr.A01158   fl_S1E   fl_S1L   7.265640  30.9565
> 764845  Eucgr.A01172   fl_S1E   fl_S1L   3.248020  16.9127
> 764927  Eucgr.A01269   fl_S1E   fl_S1L  18.710200  76.6918
> 
> 
> 
> --Kelly V.
> 
> 
> 	[[alternative HTML version deleted]]
> 
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