?? linear_dyn.m
字號:
% 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
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