How to edit matrice to another matrice?

Question

Yamina chbak 2020-3-23

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/512432-how-to-edit-matrice-to-another-matrice

评论： Sriram Tadavarty 2020-3-23

% how to edit matrice A to matrice B with
% A=[1 a b c
%    2 d e f
%    3 g h i];
%  % 
%  B=[ 1 a b 0
%      2 b c 0
%      3 c a 0
%      4 d e 0
%      5 e f 0
%      6 f d 0
%      ...
%      9 i g 0 ]
%% I have a code for this but it's not work
A=[1 a b c; 2 d e f; 3 g h i];
[m,n]=size(A);
B=zeros(3*m,n);
for i=1:3*m
B(i,1)=i;
B(i,4)=0;
end
for k=1:3
for i=1:3:3*m
B(i,2)=A(k,2);
B(i,3)=A(k,3);
end
for i=2:3:3*m
B(i,2)=A(k,3);
B(i,3)=A(k,4);
end
for i=3:3:3*m
B(i,2)=A(k,4);
B(i,3)=A(k,2);
end
end 
B

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Yamina chbak 2020-3-23

You can choose a number for a,b,c,d,e,f, and g

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Sriram Tadavarty 2020-3-23

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/512432-how-to-edit-matrice-to-another-matrice#answer_421522

在 MATLAB Online 中打开

Hi Ahdia,

To perform just what you have asked for, you can do something as below:

a = 10;
b = 20;
c = 30;
d = 40;
e = 50;
f = 60;
g = 70;
h = 80;
i = 80;
A=[1 a b c; 2 d e f; 3 g h i];
Atemp = A(:,2:end); % Extacting the different variables
ACTemp = circshift(Atemp,-1,2); % Performing the circular shift
CTemp = [Atemp ACTemp]; % Combine both matrices and extract the respective indices
BTemp = reshape([CTemp(:,1:3:end) CTemp(:,2:3:end) CTemp(:,3:3:end)]',[],1);
B = zeros(9,4);
B(:,1) = 1;
B(:,2) = BTemp(1:2:end);
B(:,3) = BTemp(2:2:end);