Fix another dups detection issue

Signed-off-by: Johannes Mueller <[email protected]>

pylife/stress/rainflow.py

@@ -54,14 +54,14 @@ def plateau_turns(diffs):
             edges = np.diff(duplicates)
             dups_starts = np.where(edges > 0)[0]
             dups_ends = np.where(edges < 0)[0]
-            if len(dups_starts) and len(dups_ends) and dups_ends[0] < dups_starts[0]:
+            if len(dups_starts) and len(dups_ends):
                 cut_ends = dups_ends[0] < dups_starts[0]
                 cut_starts = dups_starts[-1] > dups_ends[-1]
                 if cut_ends:
                     dups_ends = dups_ends[1:]
                 if cut_starts:
                     dups_starts = dups_starts[:-1]
-            plateau_turns[dups_starts[np.where(diffs[dups_starts] * diffs[dups_ends+1] < 0)]] = True
+                plateau_turns[dups_starts[np.where(diffs[dups_starts] * diffs[dups_ends+1] < 0)]] = True
 
         return plateau_turns
 

tests/stress/test_rainflow.py

@@ -397,6 +397,15 @@ def test_rainflow_get_turns_shifted_index_four_initial_dups():
     np.testing.assert_array_equal(values, expected_values)
 
 
+def test_rainflow_get_turns_shifted_index_four_initial_dups():
+    samples = np.array([32., 32.1, 32.9, 33., 33., 33., 33., 33., 32.5, 32., 32., 32.7, 37.2, 40., 35.2, 33., 33., 33., 33., 33.])
+    expected_index = [3, 9, 13]
+    expected_values = [33., 32., 40.]
+    index, values = RF.get_turns(samples)
+    np.testing.assert_array_equal(index, expected_index)
+    np.testing.assert_array_equal(values, expected_values)
+
+
 def test_rainflow_get_turns_leading_dups():
     samples = np.array([1., 1., 1., 2., 1.])
     expected_index = [3]