How to calculate velocity of length change and acceleration of it?

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Hello everyone,
I am trying to calculate velocity and acceleration of a length change out of the 'AddDist' matrix. I am thinking of using V=(length 2 - length 1)/time for velocity (which should give me a vector not scalar?) and a=(V2 - V1)/time for acceleration. But I am not sure how to make MatLab have the 2nd column subtracts the 1st column, then the 3rd column subtract the 2nd column, and so on...
this is what I thought how it would work but it didn't seem to make sense in MatLab for calculating what I want. 0.002 is my time as the time gap between each rows is always 0.002s.
AddDistV = (AddDist(i+1)-AddDist(i))/(0.002)
for i = 1:size(AddDist,1)
AddDistV = (AddDist(i+1)-AddDist(i))/(1/0.002)
end
I am still trying to learn coding in MATLAB. Sorry if my question is too basic. Thank you for your help and time in advance!

Accepted Answer

Cris LaPierre
Cris LaPierre on 30 Jul 2020
Use the diff function.

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