Merge pull request #848 from galenlynch/fix-set-direction-err-msg

fix: setting incorrect direction raises descriptive error

Author: cookpa

ants/core/ants_image.py

@@ -201,7 +201,7 @@ def set_direction(self, new_direction):
         if not isinstance(new_direction, np.ndarray):
             raise ValueError('arg must be np.ndarray or tuple or list')
         if len(new_direction) != self.dimension:
-            raise ValueError('must give a origin value for each dimension (%i)' % self.dimension)
+            raise ValueError('must give a direction value for each dimension (%i)' % self.dimension)
 
         get_lib_fn('setDirection')(self.pointer, new_direction)
 
@@ -686,4 +686,4 @@ def is_image(object):
     return isinstance(object, ANTsImage)
 
 def from_pointer(pointer):
-    return ANTsImage(pointer)
+    return ANTsImage(pointer)