variogram: fix cressie bug

GeoStat-Framework · Mar 28, 2020 · 0649e61 · 0649e61
1 parent 50e2a52
commit 0649e61
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/gstools/variogram/estimator.pyx b/gstools/variogram/estimator.pyx
@@ -77,7 +77,7 @@ cdef inline void normalization_cressie(
         if counts[i] == 0:
             counts[i] = 1
         variogram[i] = (
-            (1./counts[i] * variogram[i])**4 /
+            0.5 * (1./counts[i] * variogram[i])**4 /
             (0.457 + 0.494 / counts[i] + 0.045 / counts[i]**2)
         )