ASAP 'commands'
ASAP> commands()
[The scan container]
scantable - a container for integrations/scans
(can open asap/rpfits/sdfits and ms files)
copy - returns a copy of a scan
get_scan - gets a specific scan out of a scantable
(by name or number)
drop_scan - drops a specific scan out of a scantable
(by number)
set_selection - set a new subselection of the data
get_selection - get the current selection object
summary - print info about the scantable contents
stats - get specified statistic of the spectra in
the scantable
stddev - get the standard deviation of the spectra
in the scantable
get_tsys - get the TSys
get_time - get the timestamps of the integrations
get_sourcename - get the source names of the scans
get_azimuth - get the azimuth of the scans
get_elevation - get the elevation of the scans
get_parangle - get the parallactic angle of the scans
get_unit - get the current unit
set_unit - set the abcissa unit to be used from this
point on
get_abcissa - get the abcissa values and name for a given
row (time)
get_column_names - get the names of the columns in the scantable
for use with selector.set_query
set_freqframe - set the frame info for the Spectral Axis
(e.g. 'LSRK')
set_doppler - set the doppler to be used from this point on
set_dirframe - set the frame for the direction on the sky
set_instrument - set the instrument name
set_feedtype - set the feed type
get_fluxunit - get the brightness flux unit
set_fluxunit - set the brightness flux unit
create_mask - return an mask in the current unit
for the given region. The specified regions
are NOT masked
get_restfreqs - get the current list of rest frequencies
set_restfreqs - set a list of rest frequencies
flag - flag selected channels in the data
lag_flag - flag specified frequency in the data
save - save the scantable to disk as either 'ASAP',
'SDFITS' or 'ASCII'
nbeam,nif,nchan,npol - the number of beams/IFs/Pols/Chans
nscan - the number of scans in the scantable
nrow - te number of spectra in the scantable
history - print the history of the scantable
get_fit - get a fit which has been stored witnh the data
average_time - return the (weighted) time average of a scan
or a list of scans
average_pol - average the polarisations together.
average_beam - average the beams together.
convert_pol - convert to a different polarisation type
auto_quotient - return the on/off quotient with
automatic detection of the on/off scans (closest
in time off is selected)
mx_quotient - Form a quotient using MX data (off beams)
scale, *, / - return a scan scaled by a given factor
add, +, - - return a scan with given value added
bin - return a scan with binned channels
resample - return a scan with resampled channels
smooth - return the spectrally smoothed scan
poly_baseline - fit a polynomial baseline to all Beams/IFs/Pols
auto_poly_baseline - automatically fit a polynomial baseline
recalc_azel - recalculate azimuth and elevation based on
the pointing
gain_el - apply gain-elevation correction
opacity - apply opacity correction
convert_flux - convert to and from Jy and Kelvin brightness
units
freq_align - align spectra in frequency frame
invert_phase - Invert the phase of the cross-correlation
swap_linears - Swap XX and YY
rotate_xyphase - rotate XY phase of cross correlation
rotate_linpolphase - rotate the phase of the complex
polarization O=Q+iU correlation
freq_switch - perform frequency switching on the data
stats - Determine the specified statistic, e.g. 'min'
'max', 'rms' etc.
stddev - Determine the standard deviation of the current
beam/if/pol
[Selection]
selector - a selection object to set a subset of a scantable
set_scans - set (a list of) scans by index
set_cycles - set (a list of) cycles by index
set_beams - set (a list of) beamss by index
set_ifs - set (a list of) ifs by index
set_polarisations - set (a list of) polarisations by name
or by index
set_names - set a selection by name (wildcards allowed)
set_tsys - set a selection by tsys thresholds
set_query - set a selection by SQL-like query, e.g. BEAMNO==1
reset - unset all selections
+ - merge to selections
[Math] Mainly functions which operate on more than one scantable
average_time - return the (weighted) time average
of a list of scans
quotient - return the on/off quotient
simple_math - simple mathematical operations on two scantables,
'add', 'sub', 'mul', 'div'
quotient - build quotient of the given on and off scans
(matched pairs and 1 off/n on are valid)
merge - merge a list of scantables
[Line Catalog]
linecatalog - a linecatalog wrapper, taking an ASCII or
internal format table
summary - print a summary of the current selection
set_name - select a subset by name pattern, e.g. '*OH*'
set_strength_limits - select a subset by line strength limits
set_frequency_limits - select a subset by frequency limits
reset - unset all selections
save - save the current subset to a table (internal
format)
get_row - get the name and frequency from a specific
row in the table
[Fitting]
fitter
auto_fit - return a scan where the function is
applied to all Beams/IFs/Pols.
commit - return a new scan where the fits have been
commited.
fit - execute the actual fitting process
store_fit - store the fit parameters in the data (scantable)
get_chi2 - get the Chi^2
set_scan - set the scantable to be fit
set_function - set the fitting function
set_parameters - set the parameters for the function(s), and
set if they should be held fixed during fitting
set_gauss_parameters - same as above but specialised for individual
gaussian components
get_parameters - get the fitted parameters
plot - plot the resulting fit and/or components and
residual
[Plotter]
asapplotter - a plotter for asap, default plotter is
called 'plotter'
plot - plot a scantable
plot_lines - plot a linecatalog overlay
save - save the plot to a file ('png' ,'ps' or 'eps')
set_mode - set the state of the plotter, i.e.
what is to be plotted 'colour stacked'
and what 'panelled'
set_selection - only plot a selected part of the data
set_range - set a 'zoom' window [xmin,xmax,ymin,ymax]
set_legend - specify user labels for the legend indeces
set_title - specify user labels for the panel indeces
set_abcissa - specify a user label for the abcissa
set_ordinate - specify a user label for the ordinate
set_layout - specify the multi-panel layout (rows,cols)
set_colors - specify a set of colours to use
set_linestyles - specify a set of linestyles to use if only
using one color
set_font - set general font properties, e.g. 'family'
set_histogram - plot in historam style
set_mask - set a plotting mask for a specific polarization
text - draw text annotations either in data or relative
coordinates
arrow - draw arrow annotations either in data or relative
coordinates
axhline,axvline - draw horizontal/vertical lines
axhspan,axvspan - draw horizontal/vertical regions
xyplotter - matplotlib/pylab plotting functions
[Reading files]
reader - access rpfits/sdfits files
open - attach reader to a file
close - detach reader from file
read - read in integrations
summary - list info about all integrations
[General]
commands - this command
print - print details about a variable
list_scans - list all scantables created bt the user
list_files - list all files readable by asap (default rpf)
del - delete the given variable from memory
range - create a list of values, e.g.
range(3) = [0,1,2], range(2,5) = [2,3,4]
help - print help for one of the listed functions
execfile - execute an asap script, e.g. execfile('myscript')
list_rcparameters - print out a list of possible values to be
put into $HOME/.asaprc
rc - set rc parameters from within asap
mask_and,mask_or,
mask_not - boolean operations on masks created with
scantable.create_mask
Note:
How to use this with help:
# function 'summary'
[xxx] is just a category
Every 'sub-level' in this list should be replaces by a '.' Period when
using help
Example:
ASAP> help scantable # to get info on ths scantable
ASAP> help scantable.summary # to get help on the scantable's
ASAP> help average_time