Adjustable Lag Difference?
Don't know how to title this but here goes. I have data sets with several time points per batch. For each batch I want to calculate the difference in results from time point zero. I used to compare each result to column min or max (as suitable) which worked fine, but when results are a bit jumpy, the max or min may happen at another time point than zero. I want the (desired) diff as below. Is ther...