LabVIEW
curve fit
Solved!
What is the purpose of the second while loop? Since there are no controls, nothing will ever change so it does the same calculation over and over for no reason.
Could you attach a typical data file? Thanks!
Even better, create an indicator on the 2D array leading to the second loop. Run the VI and start fitting so the indicator contains 2D data. Now make the new indicator a constant with typical data (right-click terminal...change to constant). Now save and attach the VI.
@mechen wrote:
I attached the second while loop to use its stop button. I defined its stop button as a "Curve Fitting" button as can be seen from the front panel.
Why not make it a state machine with a single loop? Your data is already in shift registers, so it would be available in the main loop. All you need is another state. The way you program it, you cannot easily go back to reading new data without additional code. Your fitting loop still needs a small wait or an event structure. Fitting needs to be done only of one of the inputs changes and not millions of times per second. You also don't need to wire all inputs, only the ones you want different from the defaults.
Why do you have two instances of the same 2D array diagram constant. This makes the code unmaintainable, because identical changes would need to be done in two different places if you need to modify things in the future.
mechen wrote:My question is how I can obtain a graph for 2d array.
The x-axis will be the first column of the 2d array. The y-axis will be the second column of the 2d array.
If x is not spaced equally, you need an xy graph. Simply extract the two columns using "index array", then bundle them into an xy graph. Check the shipping examples.
