Hi community,
This is probably an easy fix, but I'm stumped... I am looking for a scripting answer.
I am trying to make a generic workflow in a JSL add-on consisting of the following steps:
1: Create new column with non-linear prediction expression and parameters (done)
2: Model non-linear data with prediction expression and fit by groups (done)
3: Save prediction formula by groups in a new column (done)
4: Copy prediction formulas (from 3.) into a new column and differentiate by column(X) (help!)
Basically, I am trying to copy a prediction formula from one column into another column in the same data table for differentiation and subsequent visualization (graph builder).
Thanks alot 
This approach should work:
- You know the model so you can differentiate outside of JMP.
- You can use the Get Formula message to get the expression for the saved prediction formula.
- You can use the Arg() function to extract all the parameter estimates.
- You can use Substitute() to replace placeholders with the actual estimates in the derivative.
- Use the Set Formula() message with the new expression to set the new column.
