How can I calculate a double sum?
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something like this
function test
syms u(x,t,r)
u(x,t,r) = x + t + r ;
tl = 0:2:4;
rl = 1:2:5;
ur = sum(u(x,tl,rl))
end
it works if i put in "r" instead of "rl" in the sum, but I want to sum over both "t" and "r"
2 commentaires
Walter Roberson
le 24 Mai 2015
Are you wanting each t with the r corresponding in the same position, or are you wanting the combinations, first t combined in turn with each of the elements of r, second t combined with each element of r, and so on? Should the number of summations be according to length of t which would have to be the same as length of r, or should the number be length of t multiplied by length of r?
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