%DBSTACK Display function call stack.
%   The DBSTACK command displays the M-file function name and line number
%   where the breakpoint occurred, the name and line number of the M-file 
%   caller, the caller's caller, etc., until the top-most M-file function
%   is reached.
%
%   [ST,I] = DBSTACK returns the stack trace information in an M-by-1
%   structure ST with the fields:
%       name -- function name
%       line -- function line number
%   The current workspace index is returned in I.
%
%   If you step past the end of an M-file, then DBSTACK returns a negative
%   line number value to identify that special case.  For example, if the
%   last line to be executed is line 15, then the DBSTACK line number is
%   15 before you execute that line and -15 afterwards.
%
%   See also DBSTEP, DBSTOP, DBCONT, DBCLEAR, DBTYPE, DBUP, DBDOWN,
%            DBSTATUS, DBQUIT.

%   Steve Bangert, 6-25-91.
%   Copyright 1984-2000 The MathWorks, Inc. 
%   $Revision: 5.10 $  $Date: 2000/06/01 01:25:15 $
%   Built-in function.
