def _transform(self, m):
        repNum = self.mesh.vnC[:self.mesh.dim-1].prod()
        return Utils.mkvc(m).repeat(repNum)
Testing difference().
dataset/ETHPy150Open simpeg/simpeg/SimPEG/Maps.py/SurjectVertical1D._transform--crossover with--dataset/ETHPy150Open cloudera/hue/desktop/core/ext-py/Django-1.6.10/django/contrib/gis/geos/tests/test_geos.py/GEOSTest.test_difference