./toolbox
select_data.pro

Last modification date:

Wed Sep 28 13:27:11 2016

select_data

function select_data(io_object, [count=variable], [_EXTRA=extra keywords])

Select data from the given io object and return the array of matching indices.

Data can be selected based on entries in the index file, such as source name, polarization type, IF number, etc. For a complete list of eligible parameters use the procedure listcols

See the discussion on "Select" in the User's Guide for a summary of selection syntax.

The selection criteria are ultimately passed to the io class's search_index via the _EXTRA parameter.

Returns

an array of indicies. Returns a value of -1 if no match was found.

Version

$Id$

Parameters
io_object in, required sdfits io object	The io object on which the selection is performed

Keywords
count out, optional variable	The number of matches found.
_EXTRA in, optional extra keywords	These are the selection parameters.