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+--- Thread: Trigonometric regressions on hp 48? (/thread-8146.html)
Trigonometric regressions on hp 48? - thomasross - 04-11-2017 03:20 AM
Hi,
Is there a program or any way to do since cosine and tangent regressions on the HP 48?
RE: Trigonometric regressions on hp 48? - Eddie W. Shore - 04-11-2017 04:20 AM
Trigonometric regressions will have to be programmed on the HP 48, as they are not default regressions offered through the Stat menu.
RE: Trigonometric regressions on hp 48? - thomasross - 04-14-2017 06:07 AM
Do you know of any programs for the HP 48 to do this?
RE: Trigonometric regressions on hp 48? - Han - 04-14-2017 08:06 PM
(04-14-2017 06:07 AM)thomasross Wrote: Do you know of any programs for the HP 48 to do this?
You can use SOLVESYS to do a regression using ANY formula (including trig formulas). The documentation for SOLVESYS even includes an example of how to do a regression.
RE: Trigonometric regressions on hp 48? - thomasross - 04-15-2017 04:09 AM
(04-14-2017 08:06 PM)Han Wrote:(04-14-2017 06:07 AM)thomasross Wrote: Do you know of any programs for the HP 48 to do this?
You can use SOLVESYS to do a regression using ANY formula (including trig formulas). The documentation for SOLVESYS even includes an example of how to do a regression.
Thanks! Do you just need to enter how many data entries you have as the third parameter? Is there any way to do it automatically?
RE: Trigonometric regressions on hp 48? - Csaba Tizedes - 04-15-2017 09:58 AM
(04-11-2017 03:20 AM)thomasross Wrote: Hi,
Is there a program or any way to do since cosine and tangent regressions on the HP 48?
Can you post here a data and a regression function to see clearly what you needed exactly?!?
Thanks!
Csaba
RE: Trigonometric regressions on hp 48? - Han - 04-15-2017 11:08 AM
(04-15-2017 09:58 AM)Csaba Tizedes Wrote:(04-11-2017 03:20 AM)thomasross Wrote: Hi,
Is there a program or any way to do since cosine and tangent regressions on the HP 48?
Can you post here a data and a regression function to see clearly what you needed exactly?!?
Thanks!
Csaba
Here's the documentation online: http://isa.umh.es/calc/ss49docs/solve49.htm
Scroll down to "Example 3: Nonlinear least-squares" to see an example. In your case, you would simply need to change the data; you will also need to change the formula to something like: 'Y=A*COS(B*T ADD C) ADD D'