topic Proc Mixed and Residuals in Statistical Procedures

Proc Mixed and Residuals

TamaraTavares — Tue, 30 Jan 2018 22:09:12 GMT

Hello all,

I am currently running a linear mixed model using Proc Mixed for a longitudinal and clustered data set. I have two questions relating to the residuals:

(1) As each participant has two data points (longitudinal data), should I indicate (effect=participant ID) in the model line to obtain influence diagnostics for each observation for each participant?

(2) When I use the code "residual outp=lib.XXX", the residuals in the output file "XXX" are different from the ones indicated in the figures when I use the "influence". Does anyone know why these residuals are different, and importantly, which one I should use?

Thank you in advance for your help.

Best,

Tamara

Re: Proc Mixed and Residuals [how to improve your question]

Community_Guide — Thu, 01 Feb 2018 03:04:15 GMT

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Re: Proc Mixed and Residuals

sld — Thu, 01 Feb 2018 03:09:40 GMT

There are lots of different kinds of residuals. You'll find details in the documentation for the MIXED procedure.

If you still have questions after reading the documentation (in particular, the RESIDUAL option in the MODEL statement), please post your code and an example of your data set.