www.gusucode.com > elfun工具箱matlab源码程序 > elfun/sign.m
%SIGN Signum 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. % Copyright 1984-2005 The MathWorks, Inc. % Built-in function.