macfanDave,
Double Y graphs are possible in Excel. In the source data / series tab for a chart you need to click Add and put in the cells for the other data set.
That's not what I am talking about. A double-Y graph has two completely different scales on each side. Suppose you have an engine where the torque goes to 100 ft-lbs at most and the horsepower goes to 300. On an Excel graph, the torque curve is going to be squashed into the bottom 1/3 of the graph if the scale can accommodate the 300 hp. The current hack is to present the horsepower as hp/3 and confine it to the 0-100 range. Typically these curves would have arrows pointing to the left or right to indicate which scale they are related to.
Thanks for trying to help anyway. :-)



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