HP 41 advantage module curve fitting giving confusing results.
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12-29-2022, 08:03 AM
(This post was last modified: 12-29-2022 08:04 AM by trojdor.)
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RE: HP 41 advantage module curve fitting giving confusing results.
(12-29-2022 04:39 AM)halbitton Wrote: Hi Folks. Hal, Looks to me like you're probably just entering the data wrong. Those three sets of data points should give you a Lin r^2 value of 1.00. (IOW, an exact fit) An r^2 of .4129 is a horrible fit. If I were to hazard a guess, I suspect you're not entering each of the pairs of data as X,Y pairs. IOW, you first clear the summation registers, then type your first Y (3, for your example), then press Enter to place it on the Y reg, then type your first X (3, for your example), then press the Summation + key (as labeled in the upper left). Follow the same steps for the next data pair, etc. When you've entered all the data, then do the curve FIT, and choose your curve preference. (in your example, LIN) Follow with the R/S key to get your A, B, and R^2 values. If you enter everything correctly, you'll get an a=0, b=1 and r^2=1.00 mike ENTER > = |
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Messages In This Thread |
HP 41 advantage module curve fitting giving confusing results. - halbitton - 12-29-2022, 04:39 AM
RE: HP 41 advantage module curve fitting giving confusing results. - trojdor - 12-29-2022 08:03 AM
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