LabVIEW
Use of Integration VI
@LED47 wrote:
I want to use the basic integration VI .
However I don't have a formula for the input, I have an X and Y one dimensional arrays,
How could I use this VI with just the one dimensional arrays rather than a formula?
Your two input arrays differ in size so integration will fail. Can you attach a VI with clean data?
What is the output you want?
- Just the total area under the curve? (Hint: use this function!)
- A graph of the running integral for all points?
Once you clean up your data such that both arrays have equal length and x is sorted and does not contain duplicates, here's what you could do.
(Sorry, I originally had x and y reversed. I reattach a corrected version. Why would the call the lower input "T" instead of "X"????)
Integration should not need duplicate time values removed. Yes, I understand that the recommended palette VIs could return an error, but that seems to be an unnecessary restriction.
The following data is easily integrated by hand, and should be supported by the integration VIs:
**Update** Uneven Numeric Integration VI allows for duplicate time values. It only returns an error if sorting changes the order and there's one or more duplicates in T
dsb@NI wrote:
Integration should not need duplicate time values removed. Yes, I understand that the recommended palette VIs could return an error, but that seems to be an unnecessary restriction.
Hmmm,... So what would the integral be for the following data where the same X has multiple different Y values? I guess the result would depend on the order of the duplicates.
T, X
1, 5
2, 6
3, 8
3, 1000
3,-20
4, 80
5, 100
(Yes, I originally had the inputs swapped and got the duplicate error)
