Examples for plotcal

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4.5.1.1 Examples for plotcal

For example, to plot amplitude or phase as a function of time for ’G’ solutions (after rescaling by fluxscale for the NGC5921 “demo” data (see Appendix F.1),

default(’plotcal’)
fontsize = 14.0 # Make labels larger
markersize = 10.0 # Make dots bigger

caltable = ’ngc5921.usecase.fluxscale’
yaxis = ’amp’
subplot = 211
plotcal()

yaxis = ’phase’
subplot = 212
plotcal()

The results are shown in Figure 4.5. This makes use of the subplot option to make multi-panel displays.

Figure 4.5: Display of the amplitude (upper) and phase (lower) gain solutions for all antennas and polarizations in the ngc5921 post-fluxscale table.

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Similarly, to plot amplitude or phase as a function of channel for ’B’ solutions for NGC5921:

default(’plotcal’)
fontsize = 14.0 # Make labels larger
markersize = 10.0 # Make dots bigger

caltable = ’ngc5921.usecase.bcal’
antenna = ’1’
yaxis = ’amp’
subplot = 311
plotcal()

yaxis = ’phase’
subplot = 312
plotcal()

yaxis = ’snr’
subplot = 313
plotcal()

The results are shown in Figure 4.6. This stacks three panels with amplitude, phase, and signal-to-noise ratio. We have picked antenna=’1’ to show.

Figure 4.6: Display of the amplitude (upper), phase (middle), and signal-to-noise ratio (lower) of the bandpass ’B’ solutions for antenna=’0’ and both polarizations for ngc5921. Note the falloff of the SNR at the band edges in the lower panel.

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For example, to show 6 plots per page of ’B’ amplitudes on a 3 × 2 grid:

   default(’plotcal’)
   fontsize = 12.0     # Make labels just large enough
   markersize = 10.0   # Make dots bigger

   caltable = ’ngc5921.usecase.bcal’
   yaxis = ’amp’
   subplot = 231
   iteration = ’antenna’

   plotcal()

See Figure 4.7 for this example. This uses the iteration parameter.

Figure 4.7: Display of the amplitude of the bandpass ’B’ solutions. Iteration over antennas was turned on using iteration=’antenna’. The first page is shown. The user would use the Next button to advance to the next set of antennas.

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