% TTLOGSTART   Start a timing measurement in a user-controlled log.%%  Usage: ttLogStart(logID)%%  Inputs:%    logID  The identifier of the user-controlled log. Should be a %           number between and one and five that identifies which %           log to write to. The logs are numbered in order of creation.%       % See also TTCREATELOG, TTLOGSTOP, TTLOGNOW%%       TrueTime, Version 1.4%       Copyright (c) 2006%       Martin Ohlin, Dan Henriksson and Anton Cervin%       Department of Automatic Control, LTH%       Lund University, Sweden