topic Re: Actual by Predicted plot.- expand x/y axis for confidence region in Discussions

Actual by Predicted plot.- expand x/y axis for confidence region

mkiesz — Wed, 13 Sep 2023 14:33:31 GMT

Hi,

I'm trying to build a model using the "Fit Model" platform and expand the x and y range of the Actual by Predicted plot. However, once I do that, I get to a point where the confidence interval and the mean prediction line are no longer shown (see below).

Any thoughts on how to fix this?

Thanks!

Re: Actual by Predicted plot.- expand x/y axis for confidence region

Mark_Bailey — Wed, 13 Sep 2023 14:54:50 GMT

JMP discourages extrapolation of linear regression models. You can, though, achieve the result you want. Force the extrapolation by changing the Minimum value in the axis settings dialog. Double-click the axis and change the minimum value.

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Re: Actual by Predicted plot.- expand x/y axis for confidence region

mkiesz — Wed, 13 Sep 2023 17:20:33 GMT

Hi Mark,

Thanks for the reply, I've tried doing this. But at some point the (maybe ~50% beyond the mean of the data), the prediction line and confidence regions can't be extrapolated and the plot is blank in that region. This looks like maybe a default in how these two lines are initially calculated. Is there a way to expand the region these are calculated over?

Thanks,

Matt

Re: Actual by Predicted plot.- expand x/y axis for confidence region

Mark_Bailey — Wed, 13 Sep 2023 20:12:47 GMT

The method I showed you is the only way I know how to extrapolate. You can pursue this issue with JMP Technical Support (support@jmp.com). Please report any help that they might provide here for others to benefit.