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...the ARMA model, p and q are fixed, but there are some constraints in the parameters a[i] and b[j], such as for some i (i<p), a[i]=0. my problem is how to get these parameters' estimation for these constrants with arima() function? or i need to write functions to realize it. Best regards, Tongen from Beijing _________________________________________________________________ [[alternative HTML version deleted]]

Hi, I have these entries in my routes.rb file: map.connect '':id'', :controller => ''wiki'', :action => ''show'', :id => /^([A-Z]\w*)+$/ map.connect '':controller/:action/:id'' map.connect '''', :controller => ''wiki'', :action