Re: [Numpy-discussion] Sum of the product of three or more arrays
On 10/18/07, Robert Kern [EMAIL PROTECTED] wrote: Geoffrey Zhu wrote: Hi All, Given three vectors of the same lengths, X, Y, and Z, I am looking for an efficient way to calculate the following: sum(x[i]*y[i]*z[i], for i=1..n ) (x*y*z).sum() -- Robert Kern I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth. -- Umberto Eco ___ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion Thanks Robert. (x*y*z).sum() is probably faster than sum(x*y*z). ___ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion
Re: [Numpy-discussion] Sum of the product of three or more arrays
Geoffrey Zhu wrote: Hi All, Given three vectors of the same lengths, X, Y, and Z, I am looking for an efficient way to calculate the following: sum(x[i]*y[i]*z[i], for i=1..n ) (x*y*z).sum() -- Robert Kern I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth. -- Umberto Eco ___ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion
Re: [Numpy-discussion] Sum of the product of three or more arrays
I think I figured out: sum(X*Y*Z). Never mind. On 10/18/07, Geoffrey Zhu [EMAIL PROTECTED] wrote: Hi All, Given three vectors of the same lengths, X, Y, and Z, I am looking for an efficient way to calculate the following: sum(x[i]*y[i]*z[i], for i=1..n ) I am not sure if there is a vectorized way to do this. Thanks, Geoffrey ___ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion
