Integration of velocity not working, creating zeros

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%%Calculation of Velocity and Acceleration
v(i,1)= trapz(jh(i,1));
a(i,1)= trapz(v(i,1));
This is what I am using for differentiation. But both of these are coming out in the workspaces as zero... I don't know what this is. jh is jump height, there are numbers for this

Accepted Answer

dpb
dpb on 15 May 2014
trapz is an trapezoidal INTEGRATION routine, not differentiation
doc trapz
doc diff
  2 Comments
Adrienne
Adrienne on 15 May 2014
sorry i did mean integration and it is not working
dpb
dpb on 15 May 2014
Edited: dpb on 16 May 2014
"not working" is NEVER sufficient explanation for a problem.
But, if v is velocity and a acceleration, then you're going the wrong way physically.
a=dv/dt --> v=Int(a dt)
As for the zero result, looks like jh(i,1) is a single point so there's nothing to integrate over (even though you need to be differentiating instead it would appear).

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