Velocity cumtrapz or gradient

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Jair Winkelman
Jair Winkelman on 15 Sep 2019
Answered: Star Strider on 15 Sep 2019
Hello, I have an assignment in matlab where it says: variable AZ contains acceleration data of the center of mass of a moving subject. Use the function Cumptrapz to calculate the velocity and position of the person. Even when I go the help window for cumtrapz I still don't understand how I could use it for calculating the velocity or position. I have used gradient: [acceleration] = gradient (Velocity, dt), but what is the difference between gradient and Cumptrapz to calculating velocity?
Thank you very much!

Accepted Answer

Star Strider
Star Strider on 15 Sep 2019
The gradient function calculates the approximate numerical derivative of a vector, and the cumtrapz function calculates the approximate cumulative numerical integral of a vector. They are approximate inverses of each other.

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