How to position groups of matrices inside a bigger matrix

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I have a program in which I have some matrices of varying size that runs through a piece of code, for the current moment i only have two matrices. What i want to know is how would i place the matrices 'M' in a bigger matrix of zeros in a way that the values always stay in the diagonal and the rest of the matrices are zeros. So, for example if a have two matrices with size 4x4 the matrix would be a 8x8 matrix with [1:4,1:4] and [5:8,5:8] being values and the rest zeros. I want to do it in a way that i can do it for n-matrices. Here is the code i use.
for iter=1:2
D=Stations{iter};
n=length(D);
c=[0;0;0;0];
rowvector=ones(1,n);
dt0=rowvector
dn=sqrt((D(1,:)-m0(2)).^2+(D(2,:)-m0(3)).^2+(D(3,:)-m0(4)).^2);
dtx = -(D(1,:)-m0(2))./(v.*dn);
dty = -(D(2,:)-m0(3))./(v.*dn);
dtz = -(D(3,:)-m0(4))./(v.*dn);
M=[dt0; dtx; dty; dtz];
end
'Stations' is a cell array i use to store the different matrices
  2 个评论
Bob Thompson
Bob Thompson 2018-4-30
Does the code work? If not what kind of errors do you get?
Will your matrices always be square?
Feliciano Döring
The code works fine, The matrices will have varying size and dont always have to be square

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Siyu Guo
Siyu Guo 2018-5-2
blkdiag function is the tool you are looking for. Help it in MATLAB. Note you can use a loop within which the function is called iteratively to cope with n sub-matrices.

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