find a maximum matrix of three matrices

I have three matrices. A=[8,1,6;3,5,7;4,9,2], B=[6,7,2;7,4,8;1,2,3], C=[4,8,5;3,2,1;1,1,1], . I want to find the maximum of A,B and C matrices. answer should be [8,8,6;7,5,8;4,9,3]. I used max(A,B,C) Command.but it is not working.Can any one help me.

[Stephen23]

Don't store your data in lots of matrices: store your data in one ND array and then this task (and many others) becomes quite trivial:

max(array,[],dim)

Answer 1

[Torsten]

D = max(max(A,B),C)

Best wishes

Torsten.

[mahesh chathuranga]

Thanks. But I have 57 matrices like this. writing command as this is quit difficult.

[Torsten]

How are your matrices stored ? With names A, B, C, D,... ?

Best wishes

Torsten.

[mahesh chathuranga]

yes

[Torsten]

Better store all of them in one big 3-dimensional matrix M of dimension 57x3x3.

Then just use

D=max(M,[],1)

Best wishes

Torsten.

[Guillaume]

It's not difficult to implement a function that will take an arbitrary number of matrices:

function max_matrices(varargin)
%MAX_MATRICES compute the maximum of several matrices
%syntax:
%   mx = max_matrices(M1, M2, ...)
%   mx = max_matrices(CellArayOfMatrices{:})
   assert(nargin > 0, 'max_matrices requires at least one matrix');
   mx = varargin{1};
   for mxidx = 2:nargin
      mx = max(mx, varargin{mxidx});
   end
end

Note that you should prefer the second form shown under usage, that is store all your matrices into a cell array.

edit: And actually as per stephen's comment, a much simpler way is to just concatenate the matrix in a higher dimension, and one call to max would do it:

function max_matrices(varargin)
%MAX_MATRICES compute the maximum of several matrices
%syntax:
%   mx = max_matrices(M1, M2, ...)
%   mx = max_matrices(CellArayOfMatrices{:})
   assert(nargin > 0, 'max_matrices requires at least one matrix');
   dims = ndim(varargin{1})
   mx = max(cat(dims + 1, varargin{:}), [], dims+1);
end

[mahesh chathuranga]

ok. Thank you both of you. wish you all the success in MATLAB