Setting df floor in diagnostics

pysal · Sep 20, 2024 · 806120a · 806120a
1 parent dc7e01e
commit 806120a
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/spreg/diagnostics.py b/spreg/diagnostics.py
@@ -1388,6 +1388,8 @@ def likratiotest(reg0, reg1):
 
     # generalize to multiple parameters, e.g., spatial Durbin
     df = reg1.k - reg0.k
+    if not(df > 0):
+        df = 1
 
     #pvalue = stats.chisqprob(likr, 1)
     pvalue = stats.chisqprob(likr, df)