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lijunjiexmÌú³æ (СÓÐÃûÆø)
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double precision versions of dot product?
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function dot (x,y,n) cc-begin c c----------------------------------------------------------------------- c c dot (x,y,n) c c c purpose c ------- c c dot calculates the dot product of the two n-vectors c x and y. c cc-doc c input arguments c --------------- c c x = vector of length n. c y = vector of length n. c n = dimension of x and y. c c output arguments c ---------------- c c dot = value of the function, i.e. dot product of x and y. c c notes c ----- c c 1. dot contains a test for n = 0. c c----------------------------------------------------------------------- cc-end c implicit real*8 (a-h,o-z) dimension x(*),y(*) c dot = 0. if (n .le. 0) return c do 100 i = 1,n c dot = dot + x(i)*y(i) c 100 continue dot = ddot(n,x,1,y,1) end |
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lijunjiexm(½ð±Ò+10): лл£¬ºÇºÇ£¬ºÃ¶à¶¼²»¶®£¬Òª¶à¼ÓÇ¿! 2011-07-20 13:02:44
jjdg(½ð±Ò+1): ¸ÐлÄãµÄ»ý¼«²ÎÓë 2011-07-20 14:47:02
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