Matrix with numerical sequence

2018 1 12
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更新时间：2018 1 12
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Hi!
i am creating a matrix (n,m), which are the input values. the matrix needs to be like this:
[1 4 2 .... 4 2 4 1;
4 16 8 ....16 8 16 4;
2 8 4 ... 8 4 8 2;
.... .....;
4 16 8 ...16 8 16 4;
2 8 4 .... 8 4 8 2;
4 16 8 ....16 8 16 4;
1 4 2 .....4 2 4 1]
how do i code this in matlab?

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Birdman
Birdman 2018-1-12
The pattern is not clear to me. Can you be more specific?
marco lopes
marco lopes 2018-1-12
let me try to explain better, sry for bad english i got a matriz which is A= [1 4 1; 4 16 4; 1 4 1] and that matrix will add like this M =[1, 4, 1+1, 4, 1; 4, 16, 4+4, 16, 4 1+1, 4+4, 1*4', 4+4 1+1; 4, 16, 4+4, 16, 4 1, 4, 1+1, 4, 1], '=1+1+1+1 #which basicaly is the sum of the last column of A with the 1st of A, and the sum of the last line of A with the first line A;
*This repeated in a way i get a matriz with (i,j), always impar's.
*Resume: i want to know how to add A, in a a way that "A(m,n)+A(p,k)", gives, for example, a matriz that is (3,5) which adds the A(m,3) with A(p,1), and keeps the rest
#example 2: A(m,n)+A(p,k) gives a (7,5) that becomes
[1 4 2 4 1; 4 16 8 16 4; 2 8 4 8 2; 4 16 8 16 4;
2 8 4 8 2; 4 16 8 16 4; 1 4 2 4 1]

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Stephen23
Stephen23 2018-1-12
编辑：Stephen23 2018-1-12

1 个投票

N = 7; % must be odd
M = ones(N)*16;
M(1:2:N,:) = 4;
M(2:2:N*N) = 8;
M(:,[1,N]) = M(:,[1,N])/2;
M([1,N],:) = M([1,N],:)/2;
giving:
M =
1 4 2 4 2 4 1
4 16 8 16 8 16 4
2 8 4 8 4 8 2
4 16 8 16 8 16 4
2 8 4 8 4 8 2
4 16 8 16 8 16 4
1 4 2 4 2 4 1

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marco lopes
marco lopes 2018-1-12
编辑：Stephen23 2018-1-12
let me try to explain better, sry for bad english i got a matriz which is
A = [1 4 1;
4 16 4;
1 4 1]
and that matrix will add like this
M =[1, 4, 1+1, 4, 1;
4, 16, 4+4, 16, 4
1+1, 4+4, 1*4', 4+4 1+1;
4, 16, 4+4, 16, 4
1, 4, 1+1, 4, 1], '=1+1+1+1
which basicaly is the sum of the last column of A with the 1st of A, and the sum of the last line of A with the first line A;
This repeated in a way i get a matriz with (i,j), always impar's.
i want to know how to add A, in a a way that "A(m,n)+A(p,k)", gives, for example, a matriz that is (3,5) which adds the A(m,3) with A(p,1), and keeps the rest
example 2: A(m,n)+A(p,k) gives a (7,5) that becomes
[1 4 2 4 1;
4 16 8 16 4;
2 8 4 8 2;
4 16 8 16 4;
2 8 4 8 2;
4 16 8 16 4;
1 4 2 4 1]

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