def conv_to_Iqrqz(self):
# calls the C-code in RQconv
self.q_data_available = True
if self.qdata is not None:
del self.qdata
RQconv.pre_conv_Iqrqz(self.data.astype(np.int32), self.exp)
self.qdata = np.ones((self.exp.nz, self.exp.nr), dtype=np.int32)
RQconv.conv_to_Iqrqz(self.data.astype(np.int32), self.qdata, self.exp)
