Problem to display output

조회 수: 2 (최근 30일)
Deck Zhan Sim
Deck Zhan Sim 2021년 12월 13일
답변: Rik 2021년 12월 13일
Hi, I have a problem to display the output. Can someone help me to solve this? Thanks a lots!
Below here are the codes:
for i = 1:3
trans_matrix = trans_matrix + diag(ones(N-i,1),i);
end
for n = 1: length(ladder_Start)
b = trans_matrix(:,ladder_End(n));
trans_matrix(:,ladder_End(n)) = trans_matrix(:,ladder_Start(n)) + b;
trans_matrix(:,ladder_Start(n)) = zeros(1,N);
b = [];
end
for n = 1: length(snake_Head)
b = trans_matrix(:,snake_Tail(n));
trans_matrix(:,snake_Tail(n)) = trans_matrix(:,snake_Head(n)) + b;
trans_matrix(:,snake_Head(n)) = zeros(1,N);
b = [];
end
b = trans_matrix;
trans_matrix = (1/3)*b;
b = [];
ITERATIONS = 200;
d=zeros(1,ITERATIONS);
for i = 1:200
b = trans_matrix^i;
d(i) = b(N+1,1);
end
b=[];
At the command window there it shows the error of this.
  댓글 수: 2
Mathieu NOE
Mathieu NOE 2021년 12월 13일
hello
some info's are missing like :
how is initilaized trans_matrix, ladder_Start,snake_Head
Deck Zhan Sim
Deck Zhan Sim 2021년 12월 13일
trans_matrix = zeros(25,25);
ladder_Start = [3, 9, 17];
ladder_End = [7, 18, 24];
snake_Head = [16, 20, 23];
snake_Tail = [5, 12, 19];
N = 25;
Mathieu NOE Hi, this is the initilaized code that you mention

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답변 (1개)

Rik
Rik 2021년 12월 13일
Ran in:
You're trying to index b. So let's explore the values involved:
%rest of your code
for i = 1:200
b = trans_matrix^i;
disp(b)
disp(N+1)
d(i) = b(N+1,1);
end
Columns 1 through 22 0 0.3333 0 0.3333 0 0 0.3333 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.3333 0.3333 0 0.3333 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.3333 0.3333 0.3333 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.3333 0.3333 0.3333 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.3333 0.3333 0.3333 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.3333 0.3333 0 0 0 0 0 0 0 0 0 0.3333 0 0 0 0 0 0 0 0 0 0 0 0.3333 0 0.3333 0 0 0 0 0 0 0 0.3333 0 0 0 0 0 0 0 0 0 0 0 0 0 0.3333 0.3333 0 0 0 0 0 0 0.3333 0 0 0 0 0 0 0 0 0 0 0 0 0 0.3333 0.3333 0.3333 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.3333 0.3333 0.3333 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.3333 0.3333 0.3333 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.3333 0.3333 0.3333 0 0 0 0 0 0 0 0 0 0 0 0.3333 0 0 0 0 0 0 0 0 0.3333 0.3333 0 0 0 0 0 0 0 0 0 0 0 0.3333 0 0 0 0 0 0 0 0 0 0.3333 0 0 0 0 0 0 0 0 0 0 0 0.3333 0 0 0 0 0 0 0 0 0 0 0 0 0.3333 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.3333 0.3333 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.3333 0 0 0 0 0 0.3333 0.3333 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.3333 0 0 0 0 0 0 0.3333 0 0.3333 0 0 0 0 0 0 0 0 0 0 0 0 0.3333 0 0 0 0 0 0 0 0 0.3333 0.3333 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.3333 0 0.3333 0.3333 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.3333 0 0 0.3333 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.3333 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Columns 23 through 25 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.3333 0 0 0.3333 0 0 0.3333 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.3333 0 0 0.3333 0.3333 0 0.3333 0.3333 0 0 0.3333 0 0 0
26
Index in position 1 exceeds array bounds. Index must not exceed 25.
So you have a 25x25 matrix, and you try to get the first value from the 26th row. It doesn't exist, so Matlab throws the error.
Since you didn't include any comments in your code and used obfuscating names like b and d as variable names, it is impossible to understand what is happening or what the intended function was. It is therefore extremely difficult to suggest a change in your code.
This is about as self-documenting before minifying it as afterwards:
v000=zeros(25,25);v001=[3, 9, 17];v002=[7, 18, 24];v003=[16, 20, 23];v004=...
[5, 12, 19];v005=25;for v006=1:3,v000=v000 + diag(ones(v005-v006,1),v006);
end,for v007=1: length(v001),v008=v000(:,v002(v007));v000(:,v002(v007))=...
v000(:,v001(v007)) + v008;v000(:,v001(v007))=zeros(1,v005);v008=[];end,for ...
v007=1: length(v003),v008=v000(:,v004(v007));v000(:,v004(v007))=v000(:,...
v003(v007)) + v008;v000(:,v003(v007))=zeros(1,v005);v008=[];end,v008=v000;
v000=(1/3)*v008;v008=[];v009=200;v010=zeros(1,v009);for v006=1:200,v008=...
v000^v006;v010(v006)=v008(v005+1,1);end,v008=[];

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