Plugging in matrix values into function handle of more than 1 variables

Question

M Al Mamun 2020-4-6

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/515655-plugging-in-matrix-values-into-function-handle-of-more-than-1-variables

回答： Walter Roberson 2020-4-6

The symbolic variables and the function are given below.

x=sym('x',[1 9]);
x0=sym('x0',[1 9]);
Yr=sym('Yr',[3 3]);
Yi=sym('Yi',[3 3]);
f(1,1)=x(1)+Yr(2,2)*x0(3)+Yi(1,2)*x(4)+Yr(3,3);
f(2,1)=x(2)+Yr(1,2)*x0(2)+Yi(3,2)*x(4)+2*Yi(3,3);

Now, the I have the variable values as below.

Yr=ones(3,3); Yi=ones(3,3)+1;
x0=[1 2 3 4 5 6 7 8 9];

Now, how can I plug in the values of the elements of Yr, Yi and x0 present in the function handle f at a time while keeping the x variable as it is?

It would be highly appreciated if anybody could help me ragarding this. Thank you.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Walter Roberson 2020-4-6

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/515655-plugging-in-matrix-values-into-function-handle-of-more-than-1-variables#answer_424244

在 MATLAB Online 中打开

x=sym('x',[1 9]);
x0=sym('x0',[1 9]);
Yr=sym('Yr',[3 3]);
Yi=sym('Yi',[3 3]);
f(1,1)=x(1)+Yr(2,2)*x0(3)+Yi(1,2)*x(4)+Yr(3,3);
f(2,1)=x(2)+Yr(1,2)*x0(2)+Yi(3,2)*x(4)+2*Yi(3,3);
Yr_n=ones(3,3); Yi_n=ones(3,3)+1;
x0_n=[1 2 3 4 5 6 7 8 9];
subs(f, [Yr(:); Yi(:); x0(:)], [Yr_n(:); Yi_n(:); x0_n(:)])