[yt-users] pc.add_phase_object(source,[x,y,z],…)

Hi, When I do plotdata=pc.add_phase_object(source,["FieldX","FieldY","QuantityZ"],weight = None,..) plotdata.data_write_out(filename) It seems that the QuantityZ written out in file filename is transposed with respect to x-y plane of the plot plotted by pc.add_phase_object(). Has anyone encountered this? If anyone wants script and actual file to help me, I can send to you. Thanks, Renyue