# Logarithmic regression Calculator

## Analyzes the data table by logarithmic 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 |

Logarithmic regression

[1-4] /4 | Disp-Num |

- Purpose of use
- Obtaining a more exact correlation between pitot tube position in a square air duct and the flow speed for the purpose of finding the volumetric flow rate of air in said duct. I'm a University senior pursuing a B.S. in Mechanical Engineering in a Thermo-Fluid Systems Lab.

[1] 2018/11/05 13:33 Male / 20 years old level / High-school/ University/ Grad student / Useful /

- Purpose of use
- Allocate awards.

[2] 2018/09/21 23:14 Male / 40 years old level / A teacher / A researcher / Very /

- Purpose of use
- Frequency drift of a quartz crystal oscillator over extended time.
- Comment/Request
- The Log Regression showed much better correlation to my data than the "built-in" used in excel chart curve-fit utility.

I am told there''s a better way to fit this particular data by using a "sum of log regressions", where 2 independent correlated variables that both follow log function can be modeled. I wold appreciate any feedback, but I''m afraid the details are unknown to me.

[3] 2017/08/22 02:43 Male / 60 years old level or over / An engineer / Very /

- Purpose of use
- Education

[4] 2017/05/16 09:28 Male / Under 20 years old / High-school/ University/ Grad student / Very /

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