Little explorations with HP calculators (no Prime)

04012017, 11:45 PM
Post: #101




RE: Little explorations with the HP calculators
(03312017 08:33 PM)pier4r Wrote: What the function does is the following. Simple change the two coloumns (x will be 400, 375, 350, ...; and y=25, 75, 150, ...), and fit a function: For example, this kind functions fits well(?), but you must to play with the constant values in each equation for the better fit: an logistic model: (MaxMin)/(1+EXP(X/F)), where Max~7225, Min~25, F~100 or a periodic model: (MaxMin)/2×SIN(X/P×PI)+Aver, where P~850, Aver~3625. Maybe you must to make a little modification on y values, for example shift the data 12.5 for better fit, or change the interval from 400...+400 to 425...+425, as you can see above. Good luck! Csaba 

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