2.1.1.0 calibrater.plotcal

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calibrater.plotcal - Function

2.1.1 Plot a calibration table

Description

This function plots a calibration table either to a plotter or to a file.

The argument plottype can take the following values for all types of solutions:

AMP: Gain Amplitude vs. Time
1/AMP: Inverse Gain Amplitude vs. Time (useful for comparing with classic AIPS)
PHASE: Gain Phase vs. Time
RI: Gain Real vs. Imaginary
RLPHASE: Right/Left Gain phase difference (if polarizations are R,L)
XYPHASE: X/Y Gain phase difference (if polarizations are X,Y)

The argument plottype can take the following values for D tables

DAMP: Cross-polarized Gain Amplitude vs. Time
DPHASE: Cross-polarized Gain Phase vs. Time
DRI: Cross-polarized Gain Real vs. Imaginary

The quality of the solutions can be examined with the following plottype choices:

FIT: Fit per spectral window
FITWGT: Fit weight per spectral window
TOTALFIT: Total fit

By default, all antennas (as specified in the antennas argument) will appear on the same plot. Separate plots (all with the same scale) for each antenna can be activated by setting multiplot=T. The multiplot argument only separates plots by antenna (not, e.g., by the field_id(s) specified in the fields argument). If multiplot=T, the nx and ny arguments can be used to specify the number of plots per page.

At the moment, only one polarization can be plotted per execution. This restriction will be relaxed in the near future.

For B solutions, the plotting will loop over timestamps (if more than one).

A hardcopy plot can be created by specifying the psfile argument (which is especially useful for batch processing when a display screen is not available). This will cause the plot to be written to a PostScript file which can be subsequently sent to a printer.

Arguments


Inputs
antennas	Antennas to plot. Default is none.
	allowed:	intArray
	Default:
fields	Fields to plot. Default is none.
	allowed:	intArray
	Default:
spwids	Spectral windows id.’s to plot. Default is none.
	allowed:	intArray
	Default:
plottype	Plot type
	allowed:	string
	Default:	1/AMP PHASE RLPHASE XYPHASE RI DAMP DPHASE DRI FIT FITWGT TOTALFIT AMP
tablename	Calibration table name
	allowed:	string
	Default:
polarization	Polarization to plot
	allowed:	int
	Default:	1
multiplot	Turn on separate antenna plots
	allowed:	bool
	Default:	false
nx	If multiplot=T, number of plots on horizontal axis
	allowed:	int
	Default:	1
ny	If multiplot=T, number of plots on vertical axis
	allowed:	int
	Default:	1
psfile	Name of output PostScript file to write plot to. Default is to send plot to the screen.
	allowed:	string
	Default:

Returns
bool

Example

cb.open(’ngc5921.ms’);
cb.plotcal(plottype=’PHASE’, tablename="gcal", antennas=[1,3], polarization=2);
cb.close();

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