Loading and Running Tasks
First of all, if you're wondering what CASA task is needed for a job, you should start with tasklist or taskhelp. These will summarize the tasks CASA has to offer.
Loading Tasks
Once you know which task you want, there are three distinct ways to invoke it. The first:
default('clean')
will load up a task with the default parameters.
The second---equivalent to TASK in AIPS---will invoke a task, but will transfer over any currently-used parameters to that "new" task (the rest it will set to defaults).
inp clean
This might come in handy if, say, you have already set the 'vis' and 'spw' parameters for one task, and would like to use these same settings in another task.
Finally, the third option is:
tget clean
which is conveniently equivalent to TGET in AIPS This will recall the parameters from the last time the invoked task was run successfully.
Note that any of these three will work the first time you invoke a task, regardless of any nasty errors CASA might give you.
Running Tasks
To run a task after you've invoked it and set the parameters as you like, you can simply type
go clean
a la AIPS, or you type
clean()
Note that if you want to run a task asynchronously (in the background), you have to use the latter option.
Last checked on CASA Version 3.0.0 (r9860).
--Laura Chomiuk 20:30, 10 February 2010 (UTC)
