fixes gtab dmipy2dipy bug with undefined deltas (#81)

AthenaEPI · Oct 1, 2019 · 4e5dc14 · 4e5dc14
1 parent 04fb836
commit 4e5dc14
Showing 1 changed file with 6 additions and 2 deletions.
diff --git a/dmipy/core/acquisition_scheme.py b/dmipy/core/acquisition_scheme.py
@@ -899,15 +899,19 @@ def gtab_dmipy2dipy(dmipy_gradient_table):
     delta = dmipy_gradient_table.delta
     Delta = dmipy_gradient_table.Delta
 
-    if len(np.unique(delta)) > 1:
+    if delta is None:
+        pass  # leave delta undefined in dipy gtab
+    elif len(np.unique(delta)) > 1:
         msg = "Cannot create Dipy GradientTable for Acquisition schemes with "
         msg += "multiple delta (pulse duration) values, due to current "
         msg += "limitations of Dipy GradientTables."
         raise ValueError(msg)
     elif len(np.unique(delta)) == 1:
         delta = delta[0]
 
-    if len(np.unique(Delta)) > 1:
+    if Delta is None:
+        pass  # leave Delta undefined in dipy gtab
+    elif len(np.unique(Delta)) > 1:
         msg = "Cannot create Dipy GradientTable for Acquisition schemes with "
         msg += "multiple Delta (pulse sepration) values, due to current "
         msg += "limitations of Dipy GradientTables."