BugFix: place_acker output should be 2D matrix

guptavaibhav0 · guptavaibhav0 · commit 37ccb27086e5 · 2025-09-09T11:31:38.000+02:00
diff --git a/control/statefbk.py b/control/statefbk.py
@@ -252,7 +252,7 @@ def place_acker(A, B, poles):
     K = np.linalg.solve(ct, pmat)
 
     K = K[-1, :]                # Extract the last row
-    return K
+    return _ssmatrix(K)
 
 
 def lqr(*args, **kwargs):
