Trying to make a 6x6 checkerboard matrix using for loops and no if statements. trying to get my code down to 7 lines instead of 8.

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Mary Jean Savitsky 2020-9-29

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https://ww2.mathworks.cn/matlabcentral/answers/602029-trying-to-make-a-6x6-checkerboard-matrix-using-for-loops-and-no-if-statements-trying-to-get-my-code

评论： Ameer Hamza 2020-9-30

Trying to get the bolded code consolodated into 7 lines instead of 8 in order to make a 6x6 checkerboard matrix. I feel like somehow i can nest together all three for loops and only have one line for A()=a

n=6;

a=1;

A=zeros(n,n);

for i=1:2:n-1 %rows 1,3,5

for j=1:2:n %columns 1,3,5

A(i,j)=a;

end

for k=2:2:n %columns 2,4,6

A(i+1,k)=a;

end

display(A)

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Answer 1

Ameer Hamza 2020-9-29

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/602029-trying-to-make-a-6x6-checkerboard-matrix-using-for-loops-and-no-if-statements-trying-to-get-my-code#answer_502435

编辑：Ameer Hamza 2020-9-30

在 MATLAB Online 中打开

You can create it like this

n=6;
a=1;
A = zeros(n);
for i = 2:2:n
    A = A + circshift(eye(n), i);
end

Result

>> A
A =
   0     1     0     1     0
   1     0     1     0     1
   0     1     0     1     0
   1     0     1     0     1
   0     1     0     1     0
   1     0     1     0     1

Within only 7 lines with thre for loops:

n=6;
a=1;
A=zeros(n,n);
for i=1:n % all rows
    for j=1:2:n %columns 1,3,5
        for k=2:2:n %columns 2,4,6
            A(i, (mod(i,2)==1)*j+(mod(i,2)==0)*k) = a;
        end
    end
end
disp(A)

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Mary Jean Savitsky 2020-9-29

its for an assignment that asks for exactly 7 lines including 3 "for" and 3 "end" statements. So I believe there has to be a way to combine both A()=a statements :/ very interesting to see different ways I can make this matrix though, Thank you!

Ameer Hamza 2020-9-30

Check the updated answer. It shows a weird way to create this matrix with 3 "for", 3 "end" and only one line of code.

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Trying to make a 6x6 checkerboard matrix using for loops and no if statements. trying to get my code down to 7 lines instead of 8.

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Trying to make a 6x6 checkerboard matrix using for loops and no if statements. trying to get my code down to 7 lines instead of 8.

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