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.help titable Mar97 tables
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NAME
titable -- Inserts 2-D tables into rows of a 3-D table.
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USAGE
titable intable outtable
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DESCRIPTION
This task performs the inverse operation of task txtable: it inserts one or
more 2-D tables into rows of a 3-D table The input may be a filename
template, including wildcard characters, or the name of a file (preceded by
an @ sign) containing table names. The output is a single 3-D table name.
If the output table exists, insertion will be done in place. If the output
table does not exist, it will be created. The input and output tables must
not be the same.
This task supports row/column selectors in the input table names. These
may be used to select subsets of both rows and columns from the input table.
If no selectors are used, all columns and rows will be processed,
Type 'help selectors' to see a description of the selector syntax.
When creating a new output table, the information describing its columns
can be taken from two sources. If parameter 'template' has the name of an
existing 3-D table, the column descriptions, including maximum array sizes,
will be taken from that table. If 'template' has an invalid or null ("")
value, the column-defining information will be take from the first table
in the input list, where its number of rows will define the maximum array
size allowed in the table being created. Column selectors are allowed in
the template table.
NOTE: Both the output and template table names must always be supplied
complete, including their extension. Otherwise the task may get confused
on the existence of an already existing table.
Insertion is performed by first verifying if column names in both input
and output tables match. If a match is found, values taken from that column
and all selected rows from the input table will be stored as a 1-dimensional
array in a single cell in the corresponding column in the output 3-D table.
The row in this table where the insertion takes place is selected by the
"row" task parameter. It points to the row where the first table in the input
list will be inserted, subsequent tables in the list will be inserted into
subsequent rows. This mechanism is superseded if the "row" parameter is set
to INDEF or a negative value, and the keyword "ORIG_ROW" is found in the
header of the input table. This keyword is created by task txtable and its
value supersedes the row counter in the task.
If the maximum array size in a target column in the output 3-D table is
larger than the number of selected input rows, the array will be filled
up starting from its first element, and the empty elements at the end will
be set to INDEF (or "" if it is a character string column). If the maximum
array size is smaller than the number of selected rows, insertion begins by
the first selected row up to the maximum allowable size, the remaining rows
being ignored.
This task correctly handles scalars stored in the input table header
by task txtable. Since the selector mechanism does not work with these
scalars, the task will always insert them into the output table, provided
there is a match in column names.
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PARAMETERS
.ls intable [file name list/template]
A list of one or more tables to be inserted. Row/column selectors are supported.
.le
.ls outtable [table name]
Name of 3-D output table, including extension. No support exists for
"STDOUT" (ASCII output).
.le
.ls (template = "") [table name]
Name of 3-D table to be used as template when creating a new output table.
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.ls (row = INDEF) [int]
Row where insertion begins. If set to INDEF or a negative value, the row
number will be looked for in the input table header.
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.ls (verbose = yes) [boolean]
Display names of input and output tables as files are processed ?
.le
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EXAMPLES
Insert columns named FLUX and WAVELENGTH from input tables into a 3-D table:
.nf
cl> titable "itable*.tab[c:FLUX,WAVELENGTH]" otable.tab
.fi
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BUGS
The output and template table names must be supplied in full, including
the extension (e.g. ".tab"). If the output table name is not typed in full,
the task will create a new table in place of the existing one, with only the
rows actually inserted. This behavior relates to the way the underlying
"access" routine in IRAF's fio library works.
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REFERENCES
This task was written by I. Busko.
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SEE ALSO
txtable, selectors
.endhelp
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