How to run a Epanechnikov (parabolic) decay in QGIS 3.6 field calculator

by AWGIS   Last Updated May 15, 2019 16:22 PM - source

Does anyone know how you would implement a Epanechnikov (parabolic) decay to a field in QGIS field calculator. I am trying to apply varying distance decay functions in order to assess the best suitability.

I have run a Gaussian decay using but I am struggling to find any sources on how you would apply a parabolic decay ("Distance" is the field I am running this on):

exp(-("Distance" * "Distance")/(2 * (10000 * 10000 )))

Related Questions

reprojection puzzle

Updated April 16, 2019 23:22 PM

I want to split attribute on specific character? (QGIS)

Updated February 22, 2018 14:22 PM