Integration of velocity not working, creating zeros

 %%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

Answer 1

[dpb]

trapz is an trapezoidal INTEGRATION routine, not differentiation

doc trapz
doc diff

[Adrienne]

sorry i did mean integration and it is not working

[dpb]

"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).