matrix calculation for matrix

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mehmet salihi
mehmet salihi 2021-5-9
评论： arsenic 陈 2021-5-10
hi everyone,
i need urgent help for my code,
i have A=400x5 matrix, and B=0x5 matrix, i want to take the 10th rows(10 20 30 40 50 60) of the A matrix and equal them to the B matrix
for example , B(5,:)=A(50,:) and B(6,:)=A(60,:) goes like this.
please need help.

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采纳的回答

arsenic 陈
arsenic 陈 2021-5-10
a = zeros(400,5);
b = ones(1,5)
for i = 10:10:400
a(i,:) = b;
end
  2 个评论
mehmet salihi
mehmet salihi 2021-5-10
how is going to be the for loop when b=ones(40,5).
this is the difficulity of loop
arsenic 陈
arsenic 陈 2021-5-10
o i thoght B=0x5 matrix it turns out to be 40*5

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更多回答（1 个）

John D'Errico
John D'Errico 2021-5-10
编辑：John D'Errico 2021-5-10
Simple. One line. No for loop. Nothing hard.
B = A(10:10:end,:);
  3 个评论
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mehmet salihi
mehmet salihi 2021-5-10
ok, that is awesome solution. thank you very much

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