how to write special matrices

Question

safwan shraideh 2020-12-6

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https://ww2.mathworks.cn/matlabcentral/answers/682643-how-to-write-special-matrices

评论： safwan shraideh 2020-12-7

how can I write this matrix

                                           a=[0 0 0 0;
                                                0 0 0 1;
                                                0 0 1 0;
                                                0 0 1 1;
                                                0 1 0 0;
                                                0 1 0 1;
                                                0 1 1 0;
                                                0 1 1 1;
                                                1 0 0 0;
                                                1 0 0 1;
                                                1 0 1 0;
                                                1 0 1 1;
                                                1 1 0 0;
                                                1 1 0 1;
                                                1 1 1 0;
                                                1 1 1 1;]

using for loop?

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KALYAN ACHARJYA 2020-12-6

编辑：KALYAN ACHARJYA 2020-12-6

在 MATLAB Online 中打开

What you have tried so far?

dec2bin(1:15)

Using for loop, please share your efforts?

safwan shraideh 2020-12-6

Ok Kalyan, but this is not matrix, this is char. Can you help me again?

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Answer 1

Bruno Luong 2020-12-6

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https://ww2.mathworks.cn/matlabcentral/answers/682643-how-to-write-special-matrices#answer_566948

编辑：Bruno Luong 2020-12-6

在 MATLAB Online 中打开

>> dec2bin(0:2^4-1)-'0'
ans =
   0     0     0
   0     0     1
   0     1     0
   0     1     1
   1     0     0
   1     0     1
   1     1     0
   1     1     1
   0     0     0
   0     0     1
   0     1     0
   0     1     1
   1     0     0
   1     0     1
   1     1     0
   1     1     1

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safwan shraideh 2020-12-7

Thank you Bruno.

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Answer 2

Walter Roberson 2020-12-6

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https://ww2.mathworks.cn/matlabcentral/answers/682643-how-to-write-special-matrices#answer_567298

You can use the "odometer" code pattern.

https://www.mathworks.com/matlabcentral/answers/623358-get-a-combination-of-unique-paths-for-given-pair-of-numbers#comment_1082638

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safwan shraideh 2020-12-7

Thanks Walter.

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Answer 3

Setsuna Yuuki. 2020-12-6

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https://ww2.mathworks.cn/matlabcentral/answers/682643-how-to-write-special-matrices#answer_566928

在 MATLAB Online 中打开

I think it is not very efficient, but works

a = dec2bin(0:15);
i = 1;
while i<17
    c = randi([0 1],1,4);
    
    if(a(i,1:4) == sprintf('%g',c))
       b(i,1:4) = c;
       i = i+1;
    end
end

b =
   0     0     0
   0     0     1
   0     1     0
   0     1     1
   1     0     0
   1     0     1
   1     1     0
   1     1     1
   0     0     0
   0     0     1
   0     1     0
   0     1     1
   1     0     0
   1     0     1
   1     1     0
   1     1     1