www.gusucode.com > elfun工具箱matlab源码程序 > elfun/pow2.m
%POW2 Base 2 power and scale floating point number. % X = POW2(Y) for each element of Y is 2 raised to the power Y. % % X = POW2(F,E) for each element of the real array F and a integer % array E computes X = F .* (2 .^ E). The result is computed % quickly by simply adding E to the floating point exponent of F. % This corresponds to the ANSI C function ldexp() and the IEEE % floating point standard function scalbn(). % % See also LOG2, REALMAX, REALMIN. % Copyright 1984-2005 The MathWorks, Inc. % Built-in function.