# Double Sigma with an equation

16 views (last 30 days)
Ufukcan Aravci on 9 Mar 2020
Hello people, I am very new to Matlab and got stuck to a question;
The coefficients in the matrix will be used in the equation. How can I use the code and get the answer for the eqn?
Ameer Hamza on 9 Mar 2020
what is ? Is it element on i-th row and j-th column of the matrix?

Prasanna Gude on 12 Mar 2020
The equation can be solved with the help of ‘for’loop and ‘sum’ function in MATLAB. The following code will solve the equation:
for j = 1:5
for i = 1:5
X(5) = x(i,j)+x(j,i)-(x(i,i)^2);
end
sum1(5) = sum(X);
end
SUM = sum(sum1);
When you are doing both the summations from 1 to 5, the matrix ‘x’ must be of size 5x5 or above.

Paola Carranza Bravo on 7 Sep 2021
for j = 1:5
for i = 1:5
X(5) = x(i,j)+x(j,i)-(x(i,i)^2);
end
sum1(5) = sum(X);
end
SUM = sum(sum1);

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