Summary

The calstat task returns statistical information about a column in a calibration table. The following values are computed: mean value, sum of values, sum of squared values, median, median absolute deviation, quartile, minimum, maximum, variance, standard deviation, root mean square. The results are printed in the CASA logger. The statistics info can also be captured as a python dictionary return variable. See the examples.

At this time, it is not possible to apply selection to the caltable.

Parameters

caltable

Specify the name of the calibration table as a string in caltable.

axis

Specify the axis upon which to calculate statistics in axis. The possible values are 'amp' (or 'amplitude'), 'phase', 'real', 'imag' (or 'imaginary'). Also, the name of any real valued CalTable column can be given, e.g. TIME, POLY_COEFF_AMP, REF_ANT, ANTENNA1, FLAG, etc.

datacolumn

For axis='amp', 'amplitude', 'phase', 'real', 'imag', or 'imaginary' specify the name of the column from which to extract the axis values and calculate statistics. E.g., for a 'G' table from gaincal, use datacolumn='CPARAM'.

useflags