Integral model: separate calculation at origin for spectral density

GeoStat-Framework / GSTools

GSTools - A geostatistical toolbox: random fields, variogram estimation, covariance models, kriging and much more

https://geostat-framework.org

GNU Lesser General Public License v3.0

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Closed MuellerSeb closed 6 months ago

MuellerSeb commented 6 months ago

Integral.spectral_density raised a zero division error when evaluated at 0.

This fix calculates the limit value separately at the origin.