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 Author Comment/Response Ha 12/29/05 09:24am Let f(k)=1/k To get the list {f(1),f(1)+f(2),f(1)+f(2)+f(3), ... ,f(1)+f(2)+f(3)+...f(100)}}, Mathematica calculate almost 1+2+3+...+99=4950 times. (Count the number of symbol + used in the list.) Suppose we calculate this manually. We calculate f(1)+f(2), than we add f(3)to f(1)+f(2), so we get f(1)+f(2)+f(3), then we add f(4) to get f(1)+f(2)+f(3)+f(4)... by doing this, we only calculate 99 times to get the list. This is 50 times faster than the former way. How can I command mathematica to calculate in the latter way ?? URL: ,

 Subject (listing for 'It seems really really easy, but I cant') Author Date Posted It seems really really easy, but I cant Ha 12/29/05 09:24am Re: It seems really really easy, but I cant Alek 12/29/05 2:39pm Re: It seems really really easy, but I cant yehuda ben-s... 12/30/05 04:38am Re: It seems really really easy, but I cant david 12/30/05 09:10am Re: It seems really really easy, but I cant Ha 01/05/06 10:43am
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