How to integrate a signal with respect to time

[Hassene]

Hi, I am using an oscilloscope to get the current of a circuit I(t) and I need the charge Q(t) where I(t)=dQ(t)/dt.

now I am having a vector of I(t) of 1000 rows, I would like to have the primitive of that with respect to time as a 1000 rows vector.  Here is attached the VI iam using but I am getting a two elements as a result of the integration.

Do you have any idea how shoul I correct it?

Thanks in advance.

[Dennis_Knutson]

You are passing the dt of each capture to the integrate function. You want to pass the channel data. I have no idea which channel the current is. You'll have to use the index array function on the 2D array you've created from both.

[Hassene]

The channel 1 is the current, I want to integrate with respect to time. the integration that I made is an attempt I am not sure if it should be like that.

[Dennis_Knutson]

Then index element 0 of the 2D array and pass it to the integrate function.

[Hassene]

How can I do that?

[Dennis_Knutson]

As I said, use the Index Array function.

You should really take one of the LabVIEW tutorials.