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contour plot

By rehab | Mar 24, 2018 01:22PM CET

I am trying to use the Design of experimental (DoE) and my question is why the contour plot option is not activated during in the analysis of the surface response step ?
In addition the following message appeared in the end : "The following variable has been found to be constant: Desirability. The computations cannot continue. Please remove this variable from the selection before running the procedure again " , what is the meaning?

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By Efthalia | Mar 26, 2018 10:48AM CEST | XLSTAT Agent

Hello,
This happens when the experiment design includes more than two explicative factors. Note that the surface plot provides the variation of the response variable in terms of two factors.
Regarding the message, we would need to have a look at your analysis to see why this happens. Could you please send us your workbook at support@xlstat.com?
Regards,

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By rehab | Mar 27, 2018 05:29AM CEST

Ok , I will send the workbook . Thanks a lot

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