how to write this summation in matlab form ∑_(u=1)^(su-2)?

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Dhines
Dhines 2012-10-8
评论： SARSKOLIN FOSSO 2021-7-6
in this summation..the lower limit is u=1 and the upper limit is su-2. how can i write this summation limits in matlab form?

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采纳的回答

Walter Roberson
Walter Roberson 2012-10-8
If you have the symbolic toolbox, use symsum()
syms u
symsum(YourExpression, u, 1, su-2)
If you do not have the symbolic toolbox, then either use a for loop that accumulates the results, or else use an expression that calculates each term independently and then sum() them together. You could also consider using arrayfun()
arrayfun(@(u) YourExpression, 1:su-2)
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Rajnish kumar
Rajnish kumar 2015-2-16
But symsum shows error if we have summation of h(k)x(n-k) for k=1 to L; let L=10; Undefined function 'symsum' for input arguments of type 'double'.
Error: y(n)=symsum(h(r).*x(n-r),r,1,L);
SARSKOLIN FOSSO
SARSKOLIN FOSSO 2021-7-6
yes i had this error.....it is because symsum became the function

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更多回答（1 个）

Sudhanshu Gaurav
Sudhanshu Gaurav 2021-4-7
编辑：David 2021-4-7
min K k=1 n +1 i=0 n +1 j=0 cijxijk
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Walter Roberson
Walter Roberson 2021-4-7
编辑：Walter Roberson 2021-4-7
I am not sure why your post did not show up; I will ask staff.
You posted
min K k=1 n +1 i=0 n +1 j=0 cijxijk

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