gusucode.com > symbolic工具箱matlab源码程序 > symbolic/@sym/sign.m
function Y = sign(X) %SIGN Symbolic sign function. % For each element of X, sign(X) returns 1 if the element % is greater than zero, 0 if it equals zero and -1 if it is % less than zero. For the nonzero elements of complex X, % sign(X) = X/ABS(X). % % See also ABS, SYM/ABS % Copyright 2013 The MathWorks, Inc. Y = privUnaryOp(X, 'symobj::map', 'sign'); end