I finally got the result for the function to minimize, but it´s still in sym class, so it doesnt let me evaluate it for optimization. but it doesnt let me convert the variables p to double class, so that the optimization algorithm can input values in it.
How can i create a multivariable function from matrix data?
3 ビュー (過去 30 日間)
古いコメントを表示
Hi i´m new to matlab. Im trying to create a program that reads data out of a matrix and assigns those values to variables. the issue is that this must be a function for which im going to evaluate its minima, so i cannot define p.
My problem is of this kind:
im going to evaluate the minimum value possible of p
A=[150;
200;
300;]
I want to generate this from the previous data:
f(1)=A(1,1)*p(1)
f(2)=A(2,1)*p(2)
f(3)=A(3,1)*p(3)
resulting at the end that
Totalcost= f(1)+f(2)+f(3); which will a multivariable function.
I tried to use a for loop in this case but it doesnt let me assign the values in the parenthesis to the p, to make it a different variable. it keeps telling me that i´m reffering to a value that has been cleared.
what i want to know is: which commands can i use to assign values to the p as a variable of a multivariable function?
1 件のコメント
採用された回答
sixwwwwww
2013 年 12 月 4 日
編集済み: sixwwwwww
2013 年 12 月 4 日
if you have symbolic toolbox installed then you can do it as follows:
A = [150; 200; 300];
p = sym('p%d', [1 numel(A)]);
for i = 1:numel(A)
f(i) = A(i) * p(i);
end
Totalcost = sum(f(:));
disp(Totalcost)
7 件のコメント
sixwwwwww
2013 年 12 月 4 日
you need to subsitutute values for symbols p(1), p(2), ... then you can get numeric values in symbols which you can convert to double type using doouble()
その他の回答 (1 件)
参考
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!