COMMAND NAME:	edit

TYPE:		Action

SYNTAX:		"edit inputs unflagged"
		"edit inputs all"
		"edit inputs"
		"edit cursor"
		"edit duplicates procdate"
		"edit duplicates qcode"
		"edit duplicates snr"
		"edit parents"
		"edit children"
		"edit close baselines"
		"edit close triangles"
		"edit close"

DESCRIPTION:

Sets flags in the data records according to a variety of
circumstances.  These flags can be selectively unset with
the "unflag" command.

"Edit inputs" sets a flag bit in each data record for each
data selection input parameter which excludes that data point.
Thus, a scan may pass the input filter for stations, but fail
that for baselines.  The baseline bit would be set, but the
station bit would not.  Any set bit in the flag field causes
the scan to be flagged (i.e. it will not be plotted or written
to an output file).  The "unflagged" qualifier applies the filter
only to currently unflagged data.  The default "all" qualifier
sets flag bits if appropriate even in currently flagged data.

"Edit cursor" enables the cursor on an interactive graphics device
upon which data has been displayed using "plot".  The user may
type any character (except 'x', 'X', 'a', 'A', 'b' or 'B' ..  see 
below) on the keyboard to edit out the point nearest the cursor.
The cursor must be inside the border of a plot, and must be twice 
as close to the target point than any other point for success.  
Failure to meet these conditions results in an appropriate error 
message.    

Alternatively, the user may define an area on the plot within which
all points are to be edited out.  This is accomplished by typing
'a' or 'A' to locate the bottom left corner of a rectangle, and
'b' or 'B' to locate the top right corner.  Unfortunately, as yet
there is no visual indication of the current location of the 
rectangle.  This may be changed in future releases.

On devices which are not capable of erasing points from the screen
(e.g. tektronix emulators), the edited points are marked by being
overwritten by a solid square.

Do not use the mouse buttons on workstation tektronix emulators - 
these return multiple characters which may confuse the program.
The cursor editing mode is terminated by typing the character 'x' 
or 'X' on the keyboard.  The same may also be true of Xwindow
screens.

"Edit duplicates" removes duplicate scans from the database, 
ignoring flagged scans.  The term "duplicate" refers to identical
baseline, scan time, frequency code, experiment number and source.
The second argument determines which scan aedit will retain.  If
"procdate" is specified, it will keep the most recent processing.
If "qcode" is specified, the "best" quality code scan is kept. If
"snr" is specified, the highest snr scan is kept.

WARNING: Since "edit duplicates" ignores flagged scans, unflagging
data may generate more duplicates.  Similarly, reading in more
data may do the same.  In such circumstances, the recommended
course is to "unflag duplicates" and rerun "edit duplicates".

"Edit duplicates" and "edit cursor" operate only on type 2 data.

"Edit parents" and "edit children" allow you to construct a consistent
set of type-0, type-1 and type-2 data, such as may be needed for data
export, archiving, and so on.  "Edit parents" flags all type-0 and
type-1 data records which have no corresponding children (i.e. types
1 or 2 for root records, and type 2 for corel records).  "Edit children"
removes all "orphan" type 1 and 2 records (i.e. those type-2 records
with neither parent root nor corel records, and type-1 records without
parent root records).

"Edit close" flags type 2 baseline and type 3 triangle records according
to whether or not the two types of data are consistent with each other.
The baseline form of the command flags all baseline records which do
not appear in any unflagged triangle records.  The triangle form of the
command flags all triangle records for which all three constituent
baseline records are not present and unflagged.  Applying both forms
(as happens if the second argument is omitted) results in a fully
consistent set of baseline and triangle records in memory.