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Thread: Trying to calculate non linear count value based on azimuth value

  1. #16
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    Re: Trying to calculate non linear count value based on azimuth value

    This resembles calculations for latitude/longitude points, with the formulŠ and code fragments for implementing them. The article is called "Calculate distance, bearing and more between Latitude/Longitude points"
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  2. #17
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    Re: Trying to calculate non linear count value based on azimuth value

    I am trying to use a TI-83 Plus calculator to figure out the values as can't get it working in Excel... I have entered the values as per your screenshot skeeter but when I try and run the SinReg calculation I get a SINGULAR MAT error. CubicReg calculation works fine and gives the same values as you.

    Is there something else I need to set?

    Tom

    Trying to calculate non linear count value based on azimuth value-ti-83.jpg
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  3. #18
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    Re: Trying to calculate non linear count value based on azimuth value

    why are you clearing lists $L_1$ and $L_2$ ... ?

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  4. #19
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    Re: Trying to calculate non linear count value based on azimuth value

    I'd seen that step on a tutorial... I have tried again without but still get the singular mat error...?
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  5. #20
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    Re: Trying to calculate non linear count value based on azimuth value

    I just did the sinusoidal regression again on my PC based TI-84 emulator ... worked fine. I don't have an 83 to test a regression. You can download a free TI-84 emulator at the attached link ...

    https://wabbit.codeplex.com/
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  6. #21
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    Re: Trying to calculate non linear count value based on azimuth value

    Hmmm, I must be missing something. I have got the TI-84 emulator and I get the same error.

    Trying to calculate non linear count value based on azimuth value-ti-84.jpg
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  7. #22
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    Re: Trying to calculate non linear count value based on azimuth value

    Any ideas?
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  8. #23
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    Re: Trying to calculate non linear count value based on azimuth value

    Quote Originally Posted by tbow50 View Post
    Any ideas?
    what did you put in for the period? I used 188 since -47 to 47 is half a period, 94
    Attached Thumbnails Attached Thumbnails Trying to calculate non linear count value based on azimuth value-sinreg.png  
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  9. #24
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    Re: Trying to calculate non linear count value based on azimuth value

    How do I get to that screen?
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  10. #25
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    Re: Trying to calculate non linear count value based on azimuth value

    it should come up after you hit the sinreg command ...
    Attached Thumbnails Attached Thumbnails Trying to calculate non linear count value based on azimuth value-sinreg1.png   Trying to calculate non linear count value based on azimuth value-sinreg2.png  
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  11. #26
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    Re: Trying to calculate non linear count value based on azimuth value

    Weird, I don't get that option at all. When I select it I don't get any options, just have to hit enter to run it, or not as the case may be.
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  12. #27
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    Re: Trying to calculate non linear count value based on azimuth value

    you downloaded the TI-84 plus silver edition, OS 2.55MP ?
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  13. #28
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    Re: Trying to calculate non linear count value based on azimuth value

    Yeah. When you select CALC > SinReg do you have to select the lists?
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  14. #29
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    Re: Trying to calculate non linear count value based on azimuth value

    Quote Originally Posted by tbow50 View Post
    Yeah. When you select CALC > SinReg do you have to select the lists?
    yes, in the STAT-CALC menu, scroll to SinReg (choice C: ) and hit enter ... the SinReg menu shown in post #25 should show up. Iteration default is 3, X-list L_1, Y-list L_2, period 188, store RegEQ Y1, scroll down to Calculate ... enter.
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  15. #30
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    Re: Trying to calculate non linear count value based on azimuth value

    Must be a setting somewhere to enable that as I don't get that menu after selecting calc > SinReg
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