www.gusucode.com > 粒子群算法来求16个经典函数的最小最大值matlab源码程序 > code/hiddenutils/linear_dyn.m
% linear_dyn.m % returns an offset that can be added to data that increases linearly with % time, based on cputime, first time it is called is start time % % equation is: offset = (cputime - tnot)*scalefactor % where tnot = cputime at the first call % scalefactor = value that slows or speeds up linear movement % % usage: [offset] = linear_dyn(scalefactor) % Brian Birge % Rev 1.0 % 8/23/04 function out = linear_dyn(sf) % this keeps the same start time for each run of the calling function % this will reset when any calling prog is re-saved or workspace is % cleared persistent tnot % find starting time if ~exist('tnot') | length(tnot)==0 tnot = cputime; end out = (cputime-tnot)*sf; return