Interpolate one 2D array to match the size of a 2nd 2D array

[4Holger]

Dear all,

I have two 2D arrays containing spectrometer data (read from txt files via "read spreadsheet" vi).

X values = wavelength (from 400 - 700 nm), Y values = corresponding amplitude.

Problem:

Spectral data have been recorded with two different spectrometers with differing resolution.

Array1 = 1609 data points in the  400 - 700 nm range.

Array2 = 713 data points in the  400 - 700 nm range.

How can I interpolate array2 in order to make it 1609 data points as well?

(I need to do calculations with both spectra hence array size need to be the same)

Thanks a lot,

Holger

[kosist90]

Have you checked this example: C:\Program Files (x86)\National Instruments\LabVIEW XXXX\examples\Mathematics\Interpolation\1D Interpolation.vi ? I guess in your case you need to play with xi value, so it will be possible to scale it up to 1609 points.

[4Holger · Accepted solution]

Thanks a lot for getting back to me, kosist90!

In the meantime I found a powerful yet simple solution using the Resample Waveforms Single Shot vi.

For those interested, I attach a screenshot.

Thanks again, Holger