function that combines sub matrices into one matrix

2017 11 20
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更新时间：2017 11 20
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I am trying to write a function that takes as its input arguments two scalar positive integers named n and m in that order. The function returns Q, a 2n-by-2m matrix. Q consists of four n-by-m submatrices. The elements of the submatrix in the top left corner are all 0s, the elements of the submatrix at the top right are 1s, the elements in the bottom left are 2s, and the elements in the bottom right are 3s. So far I have a1 = zeros(2,3) a2 = ones(2,3); a3 = 2*ones(2,3) a4= 3*ones(2,3) A = [a1, a2; a3, a4] I don't know how to create a function from what I have.

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Birdman
Birdman 2017-11-20

1 个投票

function y=A(n,m)
a1=zeros(n,m);a2=ones(n,m);a3=2*ones(n,m);a4=3*ones(n,m);
y=[a1 a2;a3 a4];
end
From command line, write
A(2,3)

更多回答（1 个）

Andrei Bobrov
Andrei Bobrov 2017-11-20
编辑：Andrei Bobrov 2017-11-20

1 个投票

>> your_function = @(m,n)repelem([0, 1; 2, 3],m,n)
your_function =
function_handle with value:
@(m,n)repelem([0,1;2,3],m,n)
>> your_function(2,3)
ans =
0 0 0 1 1 1
0 0 0 1 1 1
2 2 2 3 3 3
2 2 2 3 3 3
>>
for older MATLAB:
your_function = @(m,n)kron([0, 1; 2, 3],ones(m,n))

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