Plotxy
From CASA Guides
Help on plotxy task:
An X-Y plotter/interactive flagger for visibility data.
An X-Y plotter/interactive flagger for visibility data.
Selected data can be flexibly plotted with a wide variety
of axes and averaging options, including iteration over
antennas and fields. Data may be listed, flagged or
unflagged interactively. The plots can be zoomed and
also saved to a file.
It is advisable to run flagmanager before using plotxy to
flag data in order to save the current flag state before
altering:
flagmanager(vis='vis_name',mode='save',versionname='before_plotxy',
comment=versionname)
See hints on using plotxy at the end.
Keyword arguments:
vis -- Name of input visibility file
default: none. example: vis='ngc5921.ms'
xaxis -- Visibility data to plot along the x-axis
default: 'time'
Options for BOTH x-axis and y-axis
'time','uvdist','chan', 'corr','freq','velo', 'u','v','w',
'azimuth','elevation','baseline','hourangle','parallacticangle'
'amp','phase','real','imag','weight'. 'x' gives antenna array
yaxis -- Visibility data to plot along the y-axis
default: 'amp'
Options: same as on xaxis:
>>> yaxis expandable parameter
datacolumn -- Visibility file data column
Note: this parameter is automatically shown whenever the
chosen yaxis is a data quantity (i.e. amp)
default: 'data'; example: datacolumn='model'
Options: 'data' (raw),'corrected','model','residual'(corrected-model)
--- Data Selection (see help par.selectdata for more detailed information)
field -- Select field using field id(s) or field name(s).
['go listobs' to obtain the list id's or names]
default: =all fields
If field string is a non-negative integer, it is assumed to
be a field index otherwise, it is assumed to be 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
spw -- Select spectral window/channels
spw='0~2,4'; spectral windows 0,1,2,4 (all channels)
spw='<2'; spectral windows less than 2 (i.e. 0,1)
spw='0:5~61'; spw 0, channels 5 to 61, INCLUSIVE
spw='*:5~61'; all spw with channels 5 to 61
spw='0,10,3:3~45'; spw 0,10 all channels, spw 3, channels 3 to 45.
spw='0~2:2~6'; spw 0,1,2 with channels 2 through 6 in each.
spw='0:0~10;15~60'; spectral window 0 with channels 0-10,15-60
NOTE ';' to separate channel selections
spw='0:0~10^2,1:20~30^5'; spw 0, channels 0,2,4,6,8,10,
spw 1, channels 20,25,30
selectdata -- Other data selection parameters
default: True
>>> selectdata expandable parameters
timerange -- Select data based on time range:
default = (all); examples,
timerange = 'YYYY/MM/DD/hh:mm:ss~YYYY/MM/DD/hh:mm:ss'
Note: if YYYY/MM/DD is missing date defaults to first day in data set
timerange='09:14:0~09:54:0' picks 40 min on first day
timerange= '25:00:00~27:30:00' picks 1 hr to 3 hr 30min on next day
timerange='09:44:00' data within one integration of time
timerange='>10:24:00' data after this time
antenna -- Select data based on antenna/baseline
default: =all
If antenna string is a non-negative integer, it is assumed
to be an antenna index, otherwise it is assumed to be an
antenna name
antenna='5&6'; baseline between antenna index 5 and index 6.
antenna='VA05&VA06'; baseline between VLA antenna 5 and 6.
antenna='5&6;7&8'; baseline 5-6 and 7-8
antenna='5'; all baselines with antenna index 5
antenna= '05'; all baselines with antenna named 05
antenna='5,6,9'; all baselines with antennas indices 5,6 and 9
correlation -- Select correlations:
default: = all correlations. Other options are any combination
of values from one of the valid lists:
'RR','LL','RL','LR','RR LL','RL LR',
'XX','YY','XY','YX','XX YY','XY YX'
uvrange -- Select data within uvrange (default units meters)
default: =all; example:
uvrange='0~1000klambda'; uvrange from 0-1000 kilo-lambda
uvrange='>4klambda';uvranges greater than 4 kilo-lambda
uvrange='0~1000km'; uvrange in kilometers
scan -- Scan number range
array -- (Sub)-array number range - under development
feed -- Multi-feed number range - under development
averagemode -- Select average mode
default: 'vector'
Options: 'vector' = average over real and image part separately.
'scalar' = scalar average of amplitude, vector
average of the phase.
= no averaging
>>> averagemode expandable parameters
timebin -- length of time intervals to average
default: '0'= no time averaging
example: timebin='60' (average over 60 second interval).
example: timebin='all' (all times obeying other selection
parameters, i.e. timerange and crossscans)
crossscans -- Have time averaging cross scan boundaries?
default: False=time averaging does not cross scan boundaries
crossbls -- Have averaging cross baseline boundaries?
default: False= averaging does not cross baseline boundaries
crossarrays -- Have averaging cross array boundaries?
default: False=averaging does not cross array boundaries
stackspw -- Stack multiple spw on top of each other?
default: False= layout spws side-by-side for xaxis='channel'
width -- number of channels to average
default: '1'= no channel averaging
example: width='32' (average 32 channels together).
example: width='all' (all channels within each selected spw)
example: width='allspw' (all channels and all spw averaged.)
restfreq -- Set rest frequency or transition name
options: (str) a frequency quanta or transition name
default: currently set rest frequency and frame in MS
see measures for known lines, e.g.
me.linelist() to list lines
me.me.spectralline to get frequency
example: restfreq='1420405751.786Hz' 21cm HI frequency
restfreq='HI' 21cm HI transition name
restfreq='115.2712GHz' CO line
>>> restfreq expandable parameters
frame -- frequency frame for spectral axis
options: (str) 'LSRK','REST','TOPO','LSRD','BARY',
'GEO','GALACTO','LGROUP','CMB'
default: currently set frequency frame in MS
see measures (me.frequency) for description
doppler -- doppler mode
options: (str) 'RADIO','Z','RATIO','BETA','GAMMA',
'OPTICAL','TRUE','RELATIVISTIC'
default: currently set doppler system in MS
see measures (me.doppler) for description
extendflag -- flagging extension parameters
default: False= no extension, only flag selected data;
example: extendflag=True
>>> extendflag expandable parameters
extendcorr -- Extend flagging based on correlation:
default: = no correlation based extension
examples:
extendcorr = 'all'
extendcorr = 'half' flags RR and LL
extendchan -- Extend flagging based on channel:
default: = no channel based extension
example:
extendchan = 'all'
extendspw -- Extend flagging based on spectral window:
default: = no spectral window based extension
example:
extendspw = 'all'
extendant -- Extend flagging based on antenna (baseline):
default: = no antenna based extension
example:
extendant = 'all'
extendtime -- Extend flagging based on time:
default: = no time based extension
example:
extendant = 'all'
subplot -- Panel number on the display screen
default: 111 (full screen display); example:
if iteration is non-blank, then
subplot=yx1 window will produce y by x plots in the window.
if iteration = , then
subplot=yxn; means the window will have y rows, and x columns
with the present execution placing the plot in location n
n = 1,..., xy, in order upper left to right, then down. An
example is the plotting of four fields on one frame
field='0'; subplot=221; plotxy()
field='1'; subplot=222; plotxy()
field='2'; subplot=223; plotxy()
field='3'; subplot=224; plotxy()
overplot -- Overplot on current plot (if possible)
default: False; example: overplot= True
showflags -- Show the flagged and unflagged data.
default: False; example: showflags=True
iteration -- Iterate plots:
default: ; no iteration
Options: 'field', 'antenna', 'baseline'.
Use the 'NEXT' button on gui to iterate through values.
To abort an iteration, close the gui window.
plotsymbol -- plot symbol. (Options include .:,o^v><s+xDd234hH|_ or
optionally preceded by one of color code k, r, g, b, c, y)
default: '.': points, medium-sized dots
example: plotsymbol='bo' (blue points, large-sized dots
r=red, b=blue, g=green, y=yellow
',' = small points
'.' = medium points
'o' = large points
plotcolor -- color. Overrides plotsymbol color settings.
default: 'darkcyan'
example: plotcolor='g' (green)
plotcolor='slateblue'
plotcolor='#7FFF34' (RGB tuple)
multicolor -- Multi-color plotting of channels and correlations
options: 'none','both','chan','corr'
default: 'corr'; example: multicolor='chan'
plotrange -- Specifies the size of the plot [xmin, xmax, ymin, ymax]
default: [0,0,0,0]; Range is self-selected
example: [0,0,0.00,0.20] only y axis is specified
To use a time range (NOTE: somewhat different sytax from timerange
['22:23:24, 23:42:20', 0.02, 0.20]
The day must be included if the visibility data span more than one day
['1997/05/09/22:02:00, 1997/05/09/23:00:00', 0.02, 0.20]
selectplot -- Additional plot control parameters
default: False; example: selectplot=true
>>> selectplot expandable parameters
markersize -- Size of the plotted marks
default: 5.0; example: markersize=10.0
linewidth -- Width of plotted lines.
default: 1; example: linewidth=2.0
skipnrows -- # of points to skip
default: 0
example: skipnrows=100 (plots every 100th point)
newplot -- When overplotting, replace the last plot only
default: False; can be useful when doing subplots
clearpanel -- 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
default: Auto
example: clearpanel='Current'
title -- Plot title (above plot)
default: ; example: title='This is my title'
xlabels -- Label for x axis
default: ; example: xlabels='X Axis'
ylabels -- Label for y axis
default: ; example: ylabels='Y Axis'
skipnrows -- # of points to skip
default: 0
example: skipnrows=100 (plots every 100th point)
newplot -- When overplotting, replace the last plot only
default: False; can be useful when doing subplots
clearpanel -- 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
default: Auto
example: clearpanel='Current'
title -- Plot title (above plot)
default: ; example: title='This is my title'
xlabels -- Label for x axis
default: ; example: xlabels='X Axis'
ylabels -- Label for y axis
default: ; example: ylabels='Y Axis'
fontsize -- Font size for labels
default: 10; example: fontsize=2
windowsize -- Window size
default: 1.0; not yet implemented
interactive -- turn on/off on screen display
options: True = interactively flag data
False = direct output to a file without on screen display
default: True;
figfile -- File name to save the plotted figure to.
default: = do not save figure;
example: figfile='myPlot.png' save figure to png file
figfile='myPlot.txt' append plotted xy to an ascii file
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 flag, unflag, locate, you must click 'Mark Region' first
then make appropriate region(s)
then click flag, unflag, locate for the desired operation
plot will then refrest
