Create a vector that only the first element and the last element is 0

Question

Ming Ki Lee 2017-1-25

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https://ww2.mathworks.cn/matlabcentral/answers/321822-create-a-vector-that-only-the-first-element-and-the-last-element-is-0

编辑： per isakson 2017-1-25

B=zeros(mx,1);
for z=1:mx
    if B(z,1) == B(1,1)
        B(z,1) = 0;
    elseif B(z,1) == B(mx,1)
        B(z,1) = 0;
    else
        B(z,1) = 1;
    end
end

I want to create a vector B that only (1,1) and (mx,1) equal to 0 but from (2 to mx,1) equal to 1. But my code still only show a zero matrix. How can I fix that?

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Answer 1

KSSV 2017-1-25

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https://ww2.mathworks.cn/matlabcentral/answers/321822-create-a-vector-that-only-the-first-element-and-the-last-element-is-0#answer_251916

编辑：KSSV 2017-1-25

在 MATLAB Online 中打开

N = 10 ;  % length of the vector
iwant = ones(N,1) ;
iwant(1) = 0 ;
iwant(N) = 0 ;

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Walter Roberson 2017-1-25

在 MATLAB Online 中打开

Or more compactly,

iwant = [0; ones(N-2,1); 0];

Jan 2017-1-25

编辑：Jan 2017-1-25

在 MATLAB Online 中打开

Or with the loop:

B = zeros(mx,1);
for z = 2:mx-1
  B(z) = 1;
end

This is not efficient and I would not use it in real programs, but it shows how your loop can be modified.

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Create a vector that only the first element and the last element is 0

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Create a vector that only the first element and the last element is 0

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