Datenaufbereitungsblatt

data mycas.nodos_oferta_demanda; infile datalines delimiter=','; input node $ demand; if demand > 0 then do; lower = 0; upper = demand; end; else if demand < 0 then do; lower = demand; upper = 0; end; else do; lower = 0; upper = 0; end; datalines; A,10 B,20 D,-5 E,-15 F,-10 ; run; data mycas.arcos_costo; infile datalines delimiter=','; input from $ to $ weight capacity; datalines; A,B,1,15 A,D,2,10 B,D,1,10 B,E,4,10 B,C,3,10 C,E,1,5 C,F,3,10 D,F,2,10 E,F,1,15 ; run;