gusucode.com > symbolic工具箱matlab源码程序 > symbolic/@single/cosint.m
function z = cosint(x) %COSINT Cosine integral function. % COSINT(x) = eulergamma + log(x) + int((cos(t)-1)/t,t,0,x), % where eulergamma denotes the Euler-Mascheroni constant. % % See also SININT. % Copyright 1993-2013 The MathWorks, Inc. z = sym.useSymForNumeric(@cosint, x);