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If an argument is specified in the help text for a
command with the symbol <col-id>
it means you must give a string which identifies one of the
existing columns in a table.
There are three ways you can specify a column in this context:
-
Column Name
- The name of the column may be used if it contains no spaces
and doesn't start with a minus character ('
-
').
It is usually matched case insensitively. If multiple columns
have the same name, the first one that matches is selected.
-
Column Index
- The index of the column may always be used; this is a useful
fallback if the column name isn't suitable for some reason.
The first column is '1', the second is '2' and so on.
Tip: if counting which column has which index is giving you a
headache, running tpipe
with omode=meta
or
omode=stats
on the table may help.
Next Previous Up Contents
Next: Specifying a list of columns
Up: Table Pipelines
Previous: Processing Filters
STILTS - Starlink Tables Infrastructure Library Tool Set
Starlink User Note
256
STILTS web page:
http://www.starlink.ac.uk/stilts/
Author email:
m.b.taylor@bristol.ac.uk