clusterrandanalysis actvsblT

[Claudia Nohn]

dear all,
i have a questions about clusteranalysis comparing baseline and 
activation period. is it really impossible to compare two periods of 
different length? and why? as far as i understand the mean of the 
baseline is used and so you have only one value per frequency anyway. 
can i avoid this problem or do i have to divide my activation period 
into different segments because my baseline period is much shorter?
thanks in advance
claudia


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