Originally Posted by
john_tullamarine
Run regressions on each of the lines separately (and that might require the lines to be segmented), use that to look up some values for the independent variable of interest ... and then run a sensible interpolation or regression to get the final answer ... works real well.
Thanks John, do you think you would be able to demonstrate that in an SS for a portion of the Press. Alt / Temp (Density Alt) carpet. Understood you don't recommend reverting to the DA theoretical model nor using XL for regression.