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[Axiom-developer] Summing over a list
From
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Alasdair McAndrew
Subject
:
[Axiom-developer] Summing over a list
Date
:
Wed, 23 May 2007 23:39:42 +1000
Given two lists,for example:
z:=[1,2,3,4,5,6]
w:=[1,0,0,1,1,1]
it seems that the sum of the pairwise product is obtained by
reduce(+,[z.i*w.i for i in 1..6])
which is all very well. But why doesn't
sum(z.i*w.i,i=1..6)
work? I mean, sum(i^2,i=1..6) is fine.
Thanks,
Alasdair
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