How can I use summation and product, simultaneously???
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Firstable Thank you for your kind.
I'm not good at MATLAB, so I always get information from this web-site.
I want to use summation(symsum) and product(symprod), simultaneously??
The equation is below.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/553092/image.png)
plz help me...
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KSSV
il 17 Mar 2021
Something like this:
m = 2 ; % i
n = 3 ; % j
C = rand(m,1) ;
k = rand(m,n) ;
M = rand(m,n) ;
iwant = zeros(m,1) ;
for i = 1:m
p = 1 ;
for j = 1:n
p = p*(1-k(i,j))^M(i,j) ;
end
iwant(i) = C(i)*p ;
end
Please cross check the code, I gave it quickly.
3 Commenti
Steven Lord
il 17 Mar 2021
symsum and symprod are not the right tools for this job. You cannot use them to evaluate expressions where the symbolic variables are used as indices into an array.
syms k
symsum(2.^k, k, 1, 10) % works
x = 1:10;
symsum(x(k), k, 1, 10) % does not work
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