AIPS HELP file for GETTHEAD in 31DEC24
As of Fri Apr 19 23:46:29 2024
GETTHEAD: Verb to read table header keywords into adverbs.
INPUTS
INNAME Image name(name).
INCLASS Image name(class).
INSEQ 0.0 9999.0 Image name(seq. #). 0=>high
INDISK 0.0 9.0 Disk drive #. 0=>any
INEXT Table type. SPECIFY
INVERS -1.0 46655.0 Table version #.
0 => highest.
KEYWORD Name of table keyword
See EXPLAIN GETTHEAD
KEYSTRNG Column label for KEYWORD =
'FIND COL'
@ Output:adverbs
KEYVALUE @ Value of a numeric parm. =
@ KEYVALUE(1) + KEYVALUE(2).
KEYSTRNG @ Value of a character-valued
@ parameter.
HELP SECTION
GETTHEAD
Type: Verb
Use: GETTHEAD is used to read the value of a table header keyword or
other information.
Adverbs:
INNAME......Image name(name). Standard defaults.
INCLASS.....Image name(class). Standard defaults.
INSEQ.......Image name(seq. #). 0 => highest.
INDISK......Disk drive # of image. 0 => any
INEXT.......Table type. No defaults.
INVERS......Table version #. 0 => highest.
KEYWORD.....The FITS name of the parameter. No default.
See EXPLAIN GETTHEAD for list.
KEYVALUE....Output adverb: The value of a numeric parameter
is returned as KEYVALUE(1) + KEYVALUE(2). The
second term will be non-zero only for double
precision parameters and will be small.
KEYSTRNG....Input adverb: the column label if keyword
'FIND COL'
Output adverb: The value of a character parameter.
EXPLAIN SECTION
GETTHEAD
PURPOSE
GETTHEAD provides read access keyword values in an AIPS
table or other information about the table. The other
information is the number of rows and the logical column numbers
of a column with a given label. In addition to the keywords in
a table the following special KEYWORDs are recognized:
'NUM ROW' Returns the number of rows in the table in
KEYVALUE(1)
'FIND COL' Determines the logical column number of a column
with the label specified by KEYSTRING; the check
is done using only the number of characters
specified in KEYSTRING. The logical column
number is returned in KEYVALUE(1).