Create a matrix from some given matrices

I have this matrix to implement. Where user would define the value of dimensions ( p and N).

what would be the most efficient way to doing this in matlab.

Answer 1

[David Hill]

As long as the size of matrices A,B,and C are the same, creating new matrix as listed above is as simple as the following.

newMatrix = [A,B,zeros(size(A));C,A,B;zeros(size(A)),C,A];

Answer 2

[Stephen23]

>> p = 2;
>> N = 3;
>> A = randi(9,p,p)
A =
     6     7
     2     1
>> B = randi(9,p,p)
B =
     3     1
     1     8
>> C = randi(9,p,p)
C =
     7     9
     3     1
>> D = {zeros(p,p),C,A,B};
>> V = ones(1,N-2);
>> X = toeplitz([3,2,V],[3,4,V]);
>> M = cell2mat(D(X))
M =
     6     7     3     1     0     0
     2     1     1     8     0     0
     7     9     6     7     3     1
     3     1     2     1     1     8
     0     0     7     9     6     7
     0     0     3     1     2     1