how to represent the mathematical parameter in matlab?

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Dhines
Dhines 2012-9-28
Here,
how to write the summation and its limits in matlab.

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Wayne King
Wayne King 2012-9-28
编辑：Wayne King 2012-9-28
Is this a question about a symbolic computation, or a numerical one?
x = randn(100,1);
% sum of x for elements 10 to 30
sum(x(20:30))
Symbolic
syms k
% sum of k from k =1 to k= 10
symsum(k,1,10)

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