Set float type property into the DMatrix.

        Parameters
        ----------
        field: str
            The field name of the information

        data: numpy array
            The array of data to be set

def set_float_info(self, field, data):
        """Set float type property into the DMatrix.

        Parameters
        ----------
        field: str
            The field name of the information

        data: numpy array
            The array of data to be set
        """
        if getattr(data, 'base', None) is not None and \
           data.base is not None and isinstance(data, np.ndarray) \
           and isinstance(data.base, np.ndarray) and (not data.flags.c_contiguous):
            self.set_float_info_npy2d(field, data)
            return
        c_data = c_array(ctypes.c_float, data)
        _check_call(_LIB.XGDMatrixSetFloatInfo(self.handle,
                                               c_str(field),
                                               c_data,
                                               c_bst_ulong(len(data))))