Trigonometric regressions on hp 48? - Printable Version +- HP Forums (https://www.hpmuseum.org/forum) +-- Forum: HP Calculators (and very old HP Computers) (/forum-3.html) +--- Forum: General Forum (/forum-4.html) +--- 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'