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Gabriel
Gabriel
Level III

DF and Lost DFs

Created: Jan 31, 2022 04:20 PM  |  Last Modified: Jun 8, 2023 08:45 PM (870 views)

Good evening all,

I have this error has shown in the image attached especially for effect of species in the image which shows zero. I have looked at previous questions addressing this but it doesn't seem to clarify my issue. Why would it recognise a Nparm but fail to recognise the DF?

 

Also, why the Lost DFs error?

Yehudah.jpeg

 

 

Gabriel Mulero
0 Kudos
2 REPLIES 2
Mark_Bailey
Staff Mark_Bailey
Staff

Re: DF and Lost DFs

Jan 31, 2022 05:06 PM (860 views)  |  Posted in reply to message from Gabriel 01-31-2022

Is this an observational study or a designed experiment?

You appear to have 3 Date, 6 Hour, and 6 Species, correct?

Did you a Singularity report at the top of the Fit Least Squares platform?

statman
Super User statman
Super User

Re: DF and Lost DFs

Created: Jan 31, 2022 06:48 PM  |  Last Modified: Jan 31, 2022 06:51 PM (850 views)  |  Posted in reply to message from Gabriel 01-31-2022

Usually this is because the model is over-specified.  You have less DF's available in the data set than the model you specified and JMP usually gives a Singularity "message" as Mark suggests.

"All models are wrong, some are useful" G.E.P. Box