Plotcal
From CASA Guides
Help on plotcal task:
An all-purpose plotter for calibration results
The values for all calibration solutions (G, T, GSPLINE, B, BPOLY, D, M)
can be displayed for a variety of polarization combinations and calibrations.
The plot solutions may be iterated through antennas/spw/fields during one execution,
and many frames can be obtained in each plot.
The plotter permits zooming, listing and flagging of solutions, although
the results of flagged solutions are not yet available.
The plotter permits zooming, listing and flagging of solutions, although
the implications of flagged solutions are not yet made. See some hints at the end
of this description.
Keyword arguments:
caltable -- Name of input calibration table
default: none; example: caltable='ngc5921.gcal'
The type of calibration table is determined automatically.
xaxis -- Value to plot on the x axis
Options: 'time','chan','freq','antenna','amp','phase','real','imag','snr'
Default: cal type dependent, usually 'time'
yaxis -- Value to plot ong the y-axis
Options: 'amp','phase','real','imag','snr','antenna'
Default: cal type dependent, usually 'amp'
poln -- Polarization (or combination) to plot
default: '' (RL); all polarizations
Options: '' = ('RL'),'R','L','XY','X','Y',
'/' --> form complex poln ratio
(amp ratio and phase difference)
field -- Select field using field id(s) or field name(s).
['go listobs' to obtain the fieldt id's or names]
default: ''=all fields
If field string is a non-negative integer, it is assumed a
field index, otherwise it is assumed a field name
field='0~2'; field ids 0,1,2
field='0,4,5~7'; field ids 0,4,5,6,7
field='3C286,3C295'; field named 3C286 and 3C295
field = '3,4C*'; field id 3, all names starting with 4C
antenna -- Antenna selection (baseline syntax ignored)
default: '' (all);
example: antenna='1,3~5' means antenna
indices 1,3,4,5.
spw -- Select spectral window (channel syntax ignored, except for D)
default: ''=all spectral windows
spw='0~2,4'; spectral windows 0,1,2,4
spw='<2'; spectral windows less than 2
timerange -- Time selection
default: '' (all)
example: timerange='1995/04/13/09:15:00~1995/04/13/09:25:00'
--- Plot Options ---
subplot -- Panel number on the display screen
default: 111 (full screen display);
examples:
if iteration = 'antenna'; subplot=321 then
a plot frame will contain the first 6 antennas, in three
rows and two columns. Follow instructions on screen to
cycle through the frames
if iteration = ''; then one frame can be filled with many
plots in a piecemeal fashion; for example
antenna='0'; subplot=221; plotcal()
antenna='1'; subplot=222; plotcal()
antenna='2'; subplot=223; plotcal()
antenna='3'; subplot=224; plotcal()
overplot -- Overplot these values on current plot (if possible)
default: False;
True (overplotting) can be done ONLY IF iteration=''
clearpanel -- Ignore this parameter.
Clear nothing on the plot window, automatically
clear plotting area, clear the current plot area, or
clear the whole plot panel.
options: None, Auto, Current, All (None and Auto not supported)
default: Auto
example: clearpanel='Current'
iteration -- Create a sequence of plots, iterating over antenna, time,
field, and/or spw
default: '' --> create in all in one plot
example: iteration='antenna' --> create a sequence of
separate plots separated by antenna. Flagging cannot
be done in iteration mode.
plotrange -- Control the x and y ranges of the plot, as a list of
values, e.g., [xmin,xmax,ymin,ymax]
default=[] --> plot will self-scale
Note: time plotting ranges are cumbersome to use.
Use the zoom option
showflags -- If true, only flagged solutions will be plotted
default: false --> only show unflagged solutions
plotsymbol -- pylab plot symbol. See cookbook for details
default: '.': large points
',' = small points (see markersize)
'-' = connect points by line
colors are cycled automatically for multi-function plots
iteration -- Create a sequence of plots, iterating over antenna, time,
field, and/or spw
default: '' --> create in all in one plot
example: iteration='antenna' --> create a sequence of
separate plots separated by antenna. Flagging cannot
be done in iteration mode.
plotrange -- Control the x and y ranges of the plot, as a list of
values, e.g., [xmin,xmax,ymin,ymax]
default=[] --> plot will self-scale
Note: time plotting ranges are cumbersome to use.
Use the zoom option
showflags -- If true, only flagged solutions will be plotted
default: false --> only show unflagged solutions
plotsymbol -- pylab plot symbol. See cookbook for details
default: '.': large points
',' = small points (see markersize)
'-' = connect points by line
colors are cycled automatically for multi-function plots
plotcolor -- Initial color to use on each plot
default: 'blue'
markersize -- Control the size of plot symbols
default: 5.0 --> a nice size for symbols
fontsize -- Control the font size of title (axes labels will be
80% of this size)
default: 10.0
showgui -- Whether or not to display the plotting GUI
default: True; example showgui=False
figfile -- File name to save the plotted figure to.
default: ''; example figfile=myPlot.png
Hints on using plotxy (see section 3.4 in cookbook)
Useful Buttons at bottom left:
5th--magnifying glass. Click on this,
left mouse button rectangle drag will zoom
right mose button rectangle drag will unzoom a certain amount
1st--restore original magnification
Useful regions just above:
Quit will terminate plotter
Next will go to next plot as specified by iteration
To locate, you must click 'Mark Region' first
then make appropriate region(s)
then click locate to list points on logger
DO NOT USE Flag, Unflag at the present time.
