Question

我想在for循环中增加A矩阵的功率但是会出错＆＃34;输入必须是标量或方形矩阵＆＃34;

function [S] =  myst()

st_1 =[0.1490 0 0.1723 0.1786 0.2015 0.1387 0.1600]';

for A = [0.5  0 0 0 0 0.5 0.2;0 0 0 0 0 0 0 ; 0 0 0 0.4 0.4 0 0;0 0 1 0.2 0.2 0 0;0 0 0 0.4 0.2 0 0.4;0 0 0 0 0 0.5 0;0.5 0 0 0 0.2 0 0.4]

    for n = 1:1:77
    A_n = A^n; % this A matrix is changing its index after every loop,
    %i don't know why index of A_n is changing?
    S = (A_n)*st_1;
    if S(1,1) == st_1(1,1)
    disp(n);
    break
    end
  end
end

disp(A);

end

Answer 1

当编写像for A=[1,2,3;4,5,6;7,8,9],disp(A);end这样的for循环时，你正在迭代A的单个列。当你打算处理完整矩阵时，只需删除外部for循环：

function [S] =  myst()

st_1 =[0.1490 0 0.1723 0.1786 0.2015 0.1387 0.1600]';

A = [0.5  0 0 0 0 0.5 0.2;0 0 0 0 0 0 0 ; 0 0 0 0.4 0.4 0 0;0 0 1 0.2 0.2 0 0;0 0 0 0.4 0.2 0 0.4;0 0 0 0 0 0.5 0;0.5 0 0 0 0.2 0 0.4]

for n = 1:1:77
    A_n = A^n; % this A matrix is changing its index after every loop,
    %i don't know why index of A_n is changing?
    S = (A_n)*st_1;
    if S(1,1) == st_1(1,1)
        disp(n);
        break
    end
end

disp(A);

end

我试图在matlab中从1：1：n增加矩阵功率for for循环但是得到错误＆＃34;输入必须是标量和方阵＆＃34;

1 个答案: