how to add a row to a matrix?

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arian hoseini
arian hoseini 2022-1-11
编辑： KSSV 2022-1-11
A=[1;2;3;4;5]
i wanna add 0 to n row..i tried A(n, :) = 0...but i get this A=[0;2;3;4;5] instead of A=[0;1;2;3;4;5]
what's the problem?

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KSSV
KSSV 2022-1-11
编辑：KSSV 2022-1-11
Ran in:
Note that you want to append zero before to the first element of A. What you did is replace the first element of A with 0.
A=[1;2;3;4;5] ;
A = [0;A]
A = 6×1
0 1 2 3 4 5
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KSSV
KSSV 2022-1-11
编辑：KSSV 2022-1-11
Ran in:
You check the output you have shown. In the output you have appended zero. You shuld not say adding at specific position, what you are doing is inserting. The procedure is same.
A = [1;2;3;4;5]
A = 5×1
1 2 3 4 5
n = 2 ;
A = [A(1:n-1) ; 0 ; A(n:end)]
A = 6×1
1 0 2 3 4 5
arian hoseini
arian hoseini 2022-1-11
A=[1;2;3;4;5]
add rows 2 and 5 to A to create B=[1;0;2;3;4;0;5]
A_temp=A;
index_rows=[2;5]
for i=1:size(index_rows,1)
mat1=A_temp(1:index_rows(i)-1);
mat2=A_temp(index_rows(i):end);
A_temp=[mat1;0;mat2];
end
B=A_temp;
i found the solution

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