# Quadratic regression Calculator

## Analyzes the data table by quadratic regression and draws the chart. | |||

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Guidelines for interpreting correlation coefficient r : 0.7＜|r|≦1 strong correlation 0.4＜|r|＜0.7 moderate correlation 0.2＜|r|＜0.4 weak correlation 0≦|r|＜0.2 no correlation |

- Purpose of use
- curve fitting of power electronic converter manufacturer's power loss data to build a simple power loss compensation routine

[1] 2018/11/02 20:06 Male / 50 years old level / An engineer / Very /

- Purpose of use
- Used to find closest quadratic fit for the angle of swirl between jet engine combustion system and exhaust temperature as a function of power level.
- Comment/Request
- Loved that I could paste a 44 point data straight in from Excel. Nice. Worked perfectly.

[2] 2018/09/13 00:20 Male / 40 years old level / An engineer / Very /

- Purpose of use
- Seeing if Social Security benefits/age is a quadratic equation
- Comment/Request
- Gave me A=20,000 B=0 C=6. Nonsense results.

Perhaps your equations explode when B=0.

Maybe for small B, you need to expand the equation as a series.

[3] 2018/08/19 00:51 Male / 60 years old level or over / A retired person / Not at All /

- Purpose of use
- research

[4] 2018/08/13 14:22 Male / 40 years old level / - / A little /

- Bug report
- Every calculation that I have done with your site has given me mixed up data. Your a and c values are switched, other than that confusing part, your site is great. Please fix that one piece everything else is helpful.

[5] 2018/05/22 06:31 - / - / - / - /

- Purpose of use
- Help on HW
- Bug report
- a =/= 12.9285... a = 0.5833...

c =/= 0.5833... c = 12.9285

Values of a and c are mixed up, b is correct.

[6] 2018/05/22 06:17 Female / Under 20 years old / Elementary school/ Junior high-school student / A little /

- Purpose of use
- Helping son with Advanced Algebra homework (calculator with regression analysis needed)
- Comment/Request
- The inputs were simple and it''s a great tool. If possible, please show the value of the max or min on the graph and the coordinating numbers below for more analysis. Keep up the good work!

[7] 2018/05/14 04:18 Female / 30 years old level / Others / Useful /

- Purpose of use
- Python quadratic regression calculator

[8] 2018/04/10 05:40 Male / Under 20 years old / High-school/ University/ Grad student / Useful /

- Purpose of use
- Finding the correlation between musical notes and their wavelengths because I got bored in my engineering class.

[9] 2018/03/21 04:49 Female / Under 20 years old / High-school/ University/ Grad student / Very /

- Purpose of use
- Building a stepper motor based antenna elevation mechanism for aiming antennas for moon bounce communication. Formula is used to calculate number of steps required to achieve desired elevation angle. Platform movement is not linear so this is perfect for adjusting the number of steps to get from one angle to another.

[10] 2018/03/14 05:23 Male / - / An engineer / Very /

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