Hi @Burger ,
In principle, yes you can do this by writing JSL code to go through the report window that has all your fits and pulling out whatever data you want. You'll need to review the tree structure of your report in order to code the script correctly. But, without specifics of exactly what your report window looks like, it's hard to provide examples or suggestions.
Another way, again depending on how your report window is setup, you can right click in a table output and select "Make Combined Data Table". Give it a try with the Big Class example data table in JMP. If you do a fit Y by X with weight and height as the Y and X, and then cast "sex" as the By variable, you'll get two graphs. If you fit a line to the data (for both graphs), you'll get some output for the fits. You can then right click the table for Parameter Estimates (for example), and select the combined data table, and it will make a new data table with the parameter estimates for each fit. This might be easier than writing the code, but it really depends on how your output is formatted and what you are trying to extract.
Hope this helps!,
DS