Display two entries in an IDL database side by side in a column format
dbcompare, list1, list2, [items, TEXTOUT= , /DIFF]
list1 - Integer scalar giving first entry number to be compared.
list2 - Integer scalar giving second entry number to be compared.
items - items to be compared, if not supplied then all items will be
compared. The items can be specified in any of the following ways:
form 1 scalar string giving item(s) as list of names
separated by commas
form 2 string array giving list of item names
form 3 string of form '$filename' giving name
of text file containing items (one item per line) line)
form 4 integer scalar giving single item number or
integer vector list of item numbers
form 5 Null string specifying interactive selection. This
is the default if 'items' is not supplied
form 6 '*' select all items (= default)
If items was undefined or a null string on input, then
on output it will contain the items interactively selected.
Optional Input Keywords
/DIFF - If this keyword is set and non-zero, then only the items
in the database that differ will be printed
TEXTOUT - Scalar Integer (1-7) Used to determine output device. See
TEXTOPEN for more info.
Output device controlled by non-standard system variable !TEXTOUT, if
TEXTOUT keyword is not used.
Display entries 3624 and 3625 in column form showing only the items
DB_INFO(), DB_ITEM, DB_ITEM_INFO(), DBRD, DBXVAL()
Written, W. Landsman July 1996
Fix documentation, add Syntax display W. Landsman November 1998
Replace DATATYPE() with size(/TNAME) W. Landsman November 2001
Assume since V5.5, remove VMS call W. Landsman September 2006
Fix problem with multiple values when /DIFF set W. Landsman April 2007