MAINT: stats.rv_generic: make error message “Domain error in argument…

…s” more informative (scipy#13172) MAINT: stats.rv_generic: make error message “Domain error in arguments” more informative Co-authored-by: Matt Haberland <[email protected]>
kevarding · Feb 21, 2022 · 33f2423 · 33f2423
1 parent d129585
commit 33f2423
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/scipy/stats/_distn_infrastructure.py b/scipy/stats/_distn_infrastructure.py
@@ -1065,7 +1065,10 @@ def rvs(self, *args, **kwds):
         args, loc, scale, size = self._parse_args_rvs(*args, **kwds)
         cond = logical_and(self._argcheck(*args), (scale >= 0))
         if not np.all(cond):
-            raise ValueError("Domain error in arguments.")
+            message = ("Domain error in arguments. The `scale` parameter must "
+                       "be positive for all distributions; see the "
+                       "distribution documentation for other restrictions.")
+            raise ValueError(message)
 
         if np.all(scale == 0):
             return loc*ones(size, 'd')