Size of Q is undefined

1 次查看（过去 30 天）

feeroz babu 2021-11-23

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1593604-size-of-q-is-undefined

评论： feeroz babu 2021-11-23

function [j] = armijo_grad_direction_dnm_f1(P1,VG,sigma)
j = 0;
signal = 0;
nn = size(Q);
n = nn(1);
I = eye(n);
while( signal == 0 && j < MAX_j)
    Q = P1^(1/2)*expm(P1^(-1/2)*2^(-j)*VG*P1^(-1/2))*P1^(1/2); % Geodesic with direction 2^(-j)*VG starting at P1. 
    PHIQ  = 1/2*trace(I-2*Q^(-1)+(Q^(-1))^(2)); % Merit Function at Q.
    PHIP1  = 1/2*trace(I-2*P1^(-1)+(P1^(-1))^(2));
    ARM = PHIQ - PHIP1 - 2^(-j)*sigma*trace(VG*P1^(-1)*VG*P^(-1)); %Armijo Gradient Direction
    if(ARM > 0)
        j = j+ 1;
    else
        signal = 1;
    end  
end
if ( j >= MAX_j)
    fprintf('\nArmijo:  j not found with %d iterations.\n',MAX_j);
    return;
end
end

2 个评论
显示无隐藏无

KSSV 2021-11-23

How did you run the function? What inputs you have used?

feeroz babu 2021-11-23

I am running this in octave then I got

error: 'P1' undefined near line 4, column 4

error: called from

armijo_newton_direction_dnm_f1 at line 4 column 4

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

KSSV 2021-11-23

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1593604-size-of-q-is-undefined#answer_838199

在 MATLAB Online 中打开

You need to define the input variables and then call the function. It seems you are striaght away hitting the f5/ run button so you are getting error.

P1 =   define your value ;   % enter value 
VG = define your value ;   % enter input 
sigma = define your value ; 
% now call the function 
j = armijo_grad_direction_dnm_f1(P1,VG,sigma)