divide a matrix into small matrices

hello everyone

by given a matrix ,for example 9x9 i wanna divide the matrix into 3x3 matrices and place new matrices instead them.

how can i do that?

thanks

Answer 1

[DGM]

Something like this:

A=randi(89,9)+10 % make an example array
B=mat2cell(A,[3 3 3],[3 3 3]) % split the array into 9 arrays 
B{1} % show one of the arrays

gives us this:

A =
    22    77    67    99    12    97    48    19    37
    26    17    61    85    50    16    69    91    79
    16    41    99    32    85    31    93    15    12
    44    55    15    48    81    13    37    91    34
    75    38    18    43    94    22    97    21    93
    45    70    96    81    28    71    80    42    85
    14    82    47    13    87    13    18    31    13
    11    71    71    81    33    86    26    60    96
    69    93    47    14    16    36    27    62    46
B =
  3×3 cell array
    {3×3 double}    {3×3 double}    {3×3 double}
    {3×3 double}    {3×3 double}    {3×3 double}
    {3×3 double}    {3×3 double}    {3×3 double}
ans =
    22    77    67
    26    17    61
    16    41    99