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DBCOMPARE

DBCOMPARE

Name


    DBCOMPARE

Purpose


    Display two entries in an IDL database side by side in a column format

Calling Sequence


    dbcompare, list1, list2, [items, TEXTOUT= , /DIFF]

Inputs


    list1 - Integer scalar giving first entry number to be compared.
    list2 - Integer scalar giving second entry number to be compared.
  OPTIONAL INPUT-OUTPUT:
    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.

System Variables


    Output device controlled by non-standard system variable !TEXTOUT, if
    TEXTOUT keyword is not used.

Example


    Display entries 3624 and 3625 in column form showing only the items
    that differ.
              IDL> dbcompare,3624,3625,/diff

Procedures Used


    DB_INFO(), DB_ITEM, DB_ITEM_INFO(), DBRD, DBXVAL()
    TEXTOPEN, TEXTCLOSE

History


    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



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