Replace Row in a Matrix with an Vector

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Haocheng Du
Haocheng Du 2019-9-18
回答： Daniel Neubauer 2022-11-2
I have generated a matrix M with M = magic(5), and I was asked to creat a new matrix M_new, where M_new is M with its last row replaced by a row vector. I was required to use only one line of code, so no equal signs...
Original question:
M_new = %Matrix M, but the last row is replaced by vector Row
% Hint: This can be done in one line of code

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回答（2 个）

KALYAN ACHARJYA
KALYAN ACHARJYA 2019-9-18
编辑：KALYAN ACHARJYA 2019-9-18
Replace Row in a Matrix with an Vector
matrix(n,:)=vector_data
n is row number, Ensured that vector_data length and row length are same
Daniel Neubauer
Daniel Neubauer 2022-11-2
Ran in:
M=magic(5)
M = 5×5
17 24 1 8 15 23 5 7 14 16 4 6 13 20 22 10 12 19 21 3 11 18 25 2 9
r=[0 0 0 0 0]
r = 1×5
0 0 0 0 0
M_new=[M(1:end-1,:);r]
M_new = 5×5
17 24 1 8 15 23 5 7 14 16 4 6 13 20 22 10 12 19 21 3 0 0 0 0 0

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