[R] data transformation ----Box-Cox Transformations
Greg Snow
Greg.Snow at imail.org
Tue May 3 19:33:55 CEST 2011
There is the bct function in the TeachingDemos package that does Box-Cox transforms (though you could also write your own fairly simply). The lappy/sapply functions will apply a function to each column of a data frame.
--
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at imail.org
801.408.8111
> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of Stuart
> Sent: Tuesday, May 03, 2011 9:37 AM
> To: r-help at r-project.org
> Subject: [R] data transformation ----Box-Cox Transformations
>
> Hi
>
> Could any one please help how I can trnasform data based on Box-Cox
> Transformations. I have massive data set with many variables. If
> possible someone can write few lines so I can read in all data set
> once and transform it.
>
>
> g1 g2 g2
> 97.03703704 89.25925926 4.444444444
> 24.90740741 69.25925926 35.55555556
> 62.22222222 85.18518519 36.85185185
> 18.51851852 84.25925926 21.66666667
> 93.7037037 95.92592593 54.07407407
> 26.66666667 23.33333333 99.25925926
> 63.33333333 97.03703704 27.40740741
> 95.74074074 3.611111111 59.25925926
> 46.66666667 49.44444444 39.16666667
> 21.85185185 2.592592593 63.14814815
> 94.72222222 17.77777778 81.11111111
>
>
> any help will be much appreciated
>
> Cheers
> Sbroad
>
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