So I have a DAQ setup measuring a signal with a start and stop. I want to save this data to an Excel sheet and also to make some mathematical operations like area under graph etc. Hence I need to post process this data.
Question 1:
What am doing is to send the acquired data to a chart and then I use ' chart history'. But sometimes I had issues as for some reason the chart history became an array of arrays with different time stamps ( not sure how and why this was the case) instead of being just one array with a start time and a stop time. So is there a better way to acquire this signal and then post process it?
Question 2:
What is the difference between: using for purpose above, a local variable for a chart, using chart history, using value property node?
Question 3:
This is an unrelated question but in same context: when to use local variable, when to use global variable when to use a FGV
: so far my understanding is to use GV when we intend to use a subvi. Use FGV when there can be a race condition but what about local variables? What are the performance issues, what is the best practice?
Thanks for your comments and answers!