Programming the statistical procedures from SAS

Warning from Proc transreg

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Regular Contributor
Posts: 204

Warning from Proc transreg

Dear all,

How are you?


Can I please ask if the "recommended" power transformation for the response from proc transreg boxcox will be affected given this warning?


  • WARNING: The BOXCOX LAMBDA= list contains extreme values.  Large values may cause overflows.

Please enlighten me on how it can be addressed.


Thank you very much.

Respected Advisor
Posts: 2,655

Re: Warning from Proc transreg

You have extremely large (or small) values that when transformed are driving the estimation of lambda.  On back-transforming, you may get an exponential overflow.

Steve Denham

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