MGH_GET_CT Name
MGH_GET_CT Purpose
This function reads a colour table file and returns a single
colour table in the form of a structure.
Calling Sequence
Result = MGH_GET_CT(table_id)
Positional Parameters
table_id (input, scalar integer or string)
The table to be read. If numeric, this argument must be an
integer, 0 <= table_id <= n_tables. If a string, this argument
must match one of the tables in the file case-insensitively.
Keywords
FILE (input, scalar string)
The name of the colour table file. The default is supplied by
invoking the function MGH_CT_FILE with the SYSTEM keyword.
NAMES (input, switch)
Set this keyword to have the function return a list of
colour-table names from the file.
SYSTEM (input, switch)
This keyword has an effect only if the FILE keyword is not
specified explicitly--see above.
Return Value
The function returns an anonymous structure with tags name
(string), red (256-element byte array), green (ditto) and blue
(ditto). Procedure
Straightforward, adapted from LOADCT.
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This software is provided subject to the following conditions:
1. NIWA makes no representations or warranties regarding the
accuracy of the software, the use to which the software may
be put or the results to be obtained from the use of the
software. Accordingly NIWA accepts no liability for any loss
or damage (whether direct of indirect) incurred by any person
through the use of or reliance on the software.
2. NIWA is to be acknowledged as the original author of the
software where the software is used or presented in any form.
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Modification History
Mark Hadfield, 1998-08:
Written.
Mark Hadfield, 2001-01:
- Upgraded for IDL 5.5.
- Added NAMES keyword.
Mark Hadfield, 2002-12:
- Upgraded for IDL 5.6.
- Default colour-table file name now calculated by MGH_CT_FILE.