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: http://www.atnf.csiro.au/computing/software/asap/cookbook/node66.html
Дата изменения: Unknown Дата индексирования: Tue Feb 5 06:53:04 2013 Кодировка: Поисковые слова: trifid nebula |
[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
summary - print info about the scantable contents
set_cursor - set a specific Beam/IF/Pol 'cursor' for
further use
get_cursor - print out the current cursor position
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_unit - get the currnt 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)
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_instrument - set the instrument name
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
lines - print list of known spectral lines
flag_spectrum - flag a whole Beam/IF/Pol
save - save the scantable to disk as either 'ASAP'
or 'SDFITS'
nbeam,nif,nchan,npol - the number of beams/IFs/Pols/Chans
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.
The dimension won't be reduced and
all polarisations will contain the
averaged spectrum.
auto_quotient - return the on/off quotient with
automatic detection of the on/off scans
quotient - return the on/off quotient
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
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
rotate_xyphase - rotate XY phase of cross correlation
rotate_linpolphase - rotate the phase of the complex
polarization O=Q+iU correlation
[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'
[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 paramaters 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 (list of) scantable
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_cursor - only plot a selected part of the data
set_range - set a 'zoom' window
set_legend - specify user labels for the legend indeces
set_title - specify user labels for the panel indeces
set_ordinate - specify a user label for the ordinate
set_abcissa - specify a user label for the abcissa
set_layout - specify the multi-panel layout (rows,cols)
[Reading files]
reader - access rpfits/sdfits files
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
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
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