Hi,
I have been given the polynominal regression coefficients for the torque, thrust, and efficiency curves - corresponding to different propeller pitch to diameter ratios. When I graph these curves - they come out fine - apart from the fact - that because they are polynomials - they "re-appear" - outwith the range of that particular curve.
So my question is - how can the "rubbish" be filtered out of these regression curves? If you look at the attached spreadsheet - you will see the efficiency curves - have a lot of rubbish - beyond the "curve".
So in essence - I would like to "stop" - the graph - once the "curve" has been displayed. I suspect - I need a program to do this - but I am unsure how to do this.
Look forward to your ideas.
Gordon.