if the cross correlation function is used to correct non constant variance, what is the difference between y and x can an x and y variable be correlated what is the best way of detrending a time series of biomass what is x/x cross correlation cross correlation function in detrending what is the cross-correlation function? why do I need a cross correlation function which of the following enables cross correlation when do you do cross correlation what is a cross correlation how to detrend x variables is cross correlation inverse what is the cross correlation of a time series? when can cross correlation be used how to detrend biomass data which variable is an x variable? what is the best way to do cross correlation? when x variable is scaled to hda what is the purpose of the cross correlation function