ellipsoid should use 3dof chi2 function

petercorke · petercorke · commit cb6568ba38ae · 2021-11-02T21:17:22.000+10:00
diff --git a/spatialmath/base/graphics.py b/spatialmath/base/graphics.py
@@ -736,7 +736,7 @@ def ellipsoid(
         # process the probability
         from scipy.stats.distributions import chi2
 
-        s = math.sqrt(chi2.ppf(confidence, df=2)) * scale
+        s = math.sqrt(chi2.ppf(confidence, df=3)) * scale
     else:
         s = scale
 
