How to Integral Signal

Hi guys!
I have a signal and I want to integral it. But problem is warnning "First input argument must be a function handle" of matlab. Because this signal is received from the channel (so its function is not defined).
Any advise? Thanks

I think you have a series of values sampled every ΔT seconds. This means the sequence:

v(0) sampled at time 0
v(1) sampled at time ΔT
v(2) sampled at time 2•ΔT
:
:
v sampled at time n•ΔT

To calculate the integral means to measure the area under the curve. You can see your signal as formed by many rectangles of base ΔT and amplitude equal to that of the sample. Usually the value of the sample could be the initial one that is:

v(0) from 0 to ΔT
V(1) from ΔT to 2•ΔT
ans so on

or the average, that is:

[v(0)+v(1)]/2 from 0 to ΔT
[v(1)+v(2)]/2 from ΔT to 2•ΔT
ans so on

however simply calculate the sum of the areas of all the rectangles (the base is always ΔT):

ΔT•Σ([v(0)+v(1)+v(2)....v]) initial value
ΔT/2•Σ([v(0)+2•v(1)+2•v(2)....v]) average value

In case ΔT varies then you have to calculate separately each area, that is: Σ([v(0)•ΔT(0)+v(1)•ΔT(1)+v(2)•ΔT(1)....v•ΔT])

What method did You use? Did You try trapezoidal integration (trapz)?
https://www.mathworks.com/help/matlab/ref/trapz.html

Thanks guys! I have done my job. I used trapz but it's not my purpose. I have same idea with albbg . I used intdump (integralanddump) in Communication Tool Box. It will perform integration with period reset and I get expected values. Thanks for support