How to integrate an Array with the other Array???

[tzou]

Hi guys, 

I have such a problem that need your help!!

I have two columns, the first column is Time (x): 1, 1.2, 1.5, 1.7, 1.8... which is uneven array.

The second column is Y :  3, 5, 7, 8....

X and Y have the same length, but the x is uneven. Now I want to do the integration of Y on x. When I use the uneven numeric integration, I found that the integration result is only one value instead of an array. But what I need is the third column which shows the integration results C. So I could plot C against x, and know how the integration goes.

Does anyone has such an experience, thanks a lot!

Basically, what I need is just like the integration what the Origin Pro does.

Tao

[RavensFan]

What do you mean by "X is uneven"?

What do you mean by column C to see how the integration goes?  Do you mean that you want to see the integration from X0 to the current X step by step throughout the whole array?

[Chris_12345]

Is this what you are looking for?

[Chris_12345 · Accepted solution]

Or at little bit cleaner code...

[tzou]

Yes, exactly.

[tzou]

Hey,

I input the same T and current values as you gave to Origin Pro, and do the integration, the values are different from this VI. I am confused

[RavensFan]

Chris' VI just does a continuous summation of the Y values.  It failed to do the multiplication by the dX.

You still haven't said what you meant by uneven X.  Did you mean that the delta X's are unequal?

[tzou]

Hey, Thanks for your reply.

I have figured this out based on what Origin does.

Thanks again.