function y = asec(z)
%ASEC   Inverse secant, result in radians.
%   ASEC(X) is the inverse secant of the elements of X.
%
%   Class support for input X:
%      float: double, single
%
%   See also SEC, ASECD.

%   Copyright 1984-2004 The MathWorks, Inc.
%   $Revision: 5.7.4.4 $  $Date: 2004/12/06 16:34:43 $

y = acos(1./z);