spectrum analysis

[Colin Millea]

Hi,
My problem is that I am taking in a spectrum ranging from the UV to the optical parts, I need to be able to be able to choose a small part, a window of 10 to 20 nm, and get a polynomial fit and differential display for the signal in that window. I have it running that it takes in the spectrum and saves after each exposure time to an excel file. Would someone be able to help me.

[altenbach]

You can do the fitting directly in LabVIEW.

Simply extract your xy-data using e.g. "array subset" and feed it to "General Polynomial Fit" (and also specify the desired polynomial order).

If you get stuck, attach your VI and we'll help you. :).