[X,M,S] = stdise(X)
[X,M,S] = stdise(X,Flag)
X [ tseries ] - Input tseries object whose data will be normalised.
Flag [ 0 | 1 ] - flag==0 normalises by N-1, flag==1 normalises by N, where N is the sample length.
X [ tseries ] - Output tseries object with standardised data.
XMeam [ numeric ] - Estimated mean subtracted from the input tseries observations.
XStd [ numeric ] - Estimated std deviation by which the input tseries observations have been divided.