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
data transformation ----Box-Cox Transformations
3 messages · Stuart, Greg Snow, John Fox
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 > > ______________________________________________ > 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.
Dear Stuart, See ?bcPower and ?powerTransform in the car package, the latter for univariate and multivariate conditional and unconditional ML Box-Cox. I hope this helps, John -------------------------------- John Fox Senator William McMaster Professor of Social Statistics Department of Sociology McMaster University Hamilton, Ontario, Canada http://socserv.mcmaster.ca/jfox
-----Original Message----- From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of Stuart Sent: May-03-11 11:37 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
______________________________________________ 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.