Adding Zeros vectors within a matrix

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Kevin Smith
Kevin Smith 2019-4-21
评论： Kevin Smith 2019-4-22
I have a 3x3 matrix of values ex
A=[ 1 2 3;
4 5 6;
7 8 9]
I need it to add zeros at certain locations with in the matrix to make a 5x5 with zeros in the 3rd and 4th row and column ex
A2=[1 2 0 0 3;
4 5 0 0 6;
0 0 0 0 0;
0 0 0 0 0;
7 8 0 0 9]
my first attempt was concatenate but I can't figure out how to move the values correctly
newA=[A,zeros(3,2)]
newA_1=[newA;zeros(2,5)]

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采纳的回答

Walter Roberson
Walter Roberson 2019-4-21
A2 = zeros(5,5);
A2([1:2, 5], [1:2, 5]) = A;

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