iteration - Iterative sum and multiplication product in matlab -


lets have starting value,multiplication value , array. want calculate sum , multiplication product similar "cumsum" (i suppose need kind of iteration). 

avgplusdm = zeros(1,size); avgplusdm(1) = 10; = 2:size         avgplusdm(i) = avgplusdm(i-1) + sf * ( plusdm(i) - avgplusdm(i-1) ); end;

sf - constant, plusdm - array. need quick possible , loop slow. how else can done?


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