Stata The Stata listserver
[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

st: box cox help


From   Manasi Vydyanath <manasi@uchicago.edu>
To   statalist@hsphsun2.harvard.edu
Subject   st: box cox help
Date   Thu, 17 Nov 2005 18:56:15 -0600

Hello -
Once again, please excuse me if this question is rather basic - I'm a stata9 user, and have a dataset (one response, two predictors) that I need to transform to normality using power transforms. I would only like to transform the independent variables, and come up with a vector of transformation coefficients to use on my variables. I'm looking to use the box-cox extension to select the appropriate transform (where you get a vector of transformation coefficients that maximizes the logarithm of the determinant of the covariance matrix for the variables being transformed.) I was somehow unable to do this with the 'boxcox' command in stata, for I kept getting a single value for the transformation coefficients...
I would really appreciate some help in this matter - the more detailed the better. :-)
I look forward to hearing from you,
Manasi
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/




© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index