title: test for level stationarity in Matlab
body: <p>Does anyone know how to test level stationarity of a time series in Matlab as in <a href="http://rgm2.lab.nig.ac.jp/RGM2/func.php?rd_id=tseries%3akpss.test" rel="nofollow">R</a>? <a href="http://www.mathworks.com/help/toolbox/econ/kpsstest.html" rel="nofollow">KPSS test</a> can only test trend stationarity in Matlab.</p>
  
  <p>I just found there is a 'trend' parameter for kpsstest in Matlab. Does kpsstest test level stationarity by setting 'trend' to be false ?</p>