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Backtransformation of Y on prediction profiler

SaraA

Hi,

After having transformed the Y data to fit a model of a DOE, how can I generate a prediction profiler that has the actual predicted Y on the Y axis instead of the transformed Y? I would like to backtransform it for ease of interpretation.

Thank you,

Sara

Accepted answers

Ben_BarrIngh

Hi @SaraA ,

Apologies, if you bring in both of the columns it should come up in the Profiler.

If you put both of the formula columns in the profiler option it should show the relationship of both

All comments

Ben_BarrIngh

Hi @SaraA ,

You can save the prediction of the transformed Y in the Fit Model and then create a new column in your data table and add a formula back transforming the saved prediction formula to the original Y. This column can then be used in the profiler (Graph>Profiler) to visualise.

Thanks,

Ben

SaraA

Hi Ben,

I have tried this but when I try to generate a profiler with the backtransformed data, it does not contain the factors of my original model. It just plots the Predicted Y on the X axis and the backtransformed predicted Y on the Y axis.

Ben_BarrIngh

Hi @SaraA ,

Apologies, if you bring in both of the columns it should come up in the Profiler.

If you put both of the formula columns in the profiler option it should show the relationship of both

SaraA

Hi Ben,

The problem is that this is what I get when I ONLY select the backtransformed column:

I don't want this profiler. I want the backtransformed data on the Y axis and my factors (I have 5 of them in my original model) on the X axis. Like this:

I don't know why the profiler does not show this factors when I use the backtransformed column.