fix: wrong code was used for the leaving row

src/simplexe.py

@@ -311,39 +311,39 @@ class Simplexe:
         # rowCount = self.TableauRowCount - 2 if self.IsPhaseI else self.TableauRowCount - 1
         # for index in range(rowCount):
 
-        rowCount = self.TableauRowCount - 2 if self.IsPhaseI else \
-            self.TableauRowCount - 1
-
-        lhs = self.__tableau[:rowCount, pivotColId]
-        rhs = self.__tableau[:rowCount, -1]
-
-        ratios = rhs / lhs
-
-        candidates = np.where(ratios > 0, ratios, np.inf)
-
-        if len((np.unique(candidates))) == 0:
-            return -1
-
-        return candidates.argmin()
-
-        # minRatio = float('inf')
-        # leavingRow = -1
-        #
         # rowCount = self.TableauRowCount - 2 if self.IsPhaseI else \
         #     self.TableauRowCount - 1
         #
-        # for index in range(rowCount):
-        #     # Si le ration est positif
-        #     if self.__tableau[index][pivotColId] > 0:
-        #         ratio = self.__tableau[index][-1] / \
-        #             self.__tableau[index][pivotColId]
-        #         if ratio < minRatio:
-        #             minRatio = ratio
-        #             leavingRow = index
+        # lhs = self.__tableau[:rowCount, pivotColId]
+        # rhs = self.__tableau[:rowCount, -1]
         #
-        # print("leaving row :", leavingRow)  # vérification ok
+        # ratios = rhs / lhs
+        #
+        # candidates = np.where(ratios > 0, ratios, np.inf)
+        #
+        # if len((np.unique(candidates))) == 0:
+        #     return -1
         #
-        # return leavingRow
+        # return candidates.argmin()
+
+        minRatio = float('inf')
+        leavingRow = -1
+
+        rowCount = self.TableauRowCount - 2 if self.IsPhaseI else \
+            self.TableauRowCount - 1
+
+        for index in range(rowCount):
+            # Si le ration est positif
+            if self.__tableau[index][pivotColId] > 0:
+                ratio = self.__tableau[index][-1] / \
+                    self.__tableau[index][pivotColId]
+                if ratio < minRatio:
+                    minRatio = ratio
+                    leavingRow = index
+
+        # print("leaving row :", leavingRow)  # vérification ok
+
+        return leavingRow
 
     def __pivotTableau(self, pivotIDs):
         if pivotIDs is None or pivotIDs[0] < 0 or pivotIDs[1] < 0: