VBA Excel add-in utilities and worksheet templates
Fourth-order, zero phase-shift Butterworth low-pass filter & adaptive butterworth filter (version 3 -22 august 2024). Download: ,
Polynomial curve fitting, interpolate, extrapolate: XlXtrFunâ„¢ Extra Functions for Microsoft Excel. (Advanced Systems Design and Development, Red Lion, USA). A shareware alternative that also works on Windows XP x64 is available via the .
Compute standard ellipses, confidence ellipses and prediction interval ellipses. Download: