Programming and Data Types 
Operating on Planes and Matrices
Functions that operate on planes or matrices, such as the linear algebra and matrix functions in the matfun
directory, do not accept multidimensional arrays as arguments. That is, you cannot use the functions in the matfun
directory, or the array operators *, ^
, \
, or /
, with multidimensional arguments. Supplying multidimensional arguments or operands in these cases results in an error.
You can use indexing to apply a matrix function or operator to matrices within a multidimensional array. For example, create a threedimensional array A
Applying the eig
function to the entire multidimensional array results in an error.
You can, however, apply eig
to planes within the array. For example, use colon notation to index just one page (in this case, the second) of the array.
Note
In the first case, subscripts are not colons, you must use squeeze to avoid an error. For example, eig(A(2,:,:)) results in an error because the size of the input is [1 3 3] . The expression eig(squeeze(A(2,:,:))) , however, passes a valid twodimensional matrix to eig .

Computing with Multidimensional Arrays  Organizing Data in Multidimensional Arrays 