I have two datasets that cover the same "X" range but do so with a different number of data points, (specifically two sets of data that start and end at the same time but one has more samples in that time than the other)and I want to divide one set by the other. When I do this in a plot window everything works because apparently one of the datasets is interpolated in order to find two "Y" values for the corresponding "X" value. This works fine except that one of my datasets is overwritten with the result which I don't want. When I did the division in the middle of a script (using an assignment statement to put the result in a new column ie Data2_b=Data1_b/Data1_c) by the dividing the larger set by the smaller set the result was truncated to the number of data points of the smaller dataset losing information and shifting the data. What suggestion does anyone have for doing this division accurately and simply in a script. I have thought of some elaborate work arounds but there must be a simple answer.