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Section: Basic Matrix functions

Name: dim2

Returns the dimension sizes of a matrix.
This functions returns an (Caml) array with the sizes for each dimension of the argument matrix.
[ sizes:int array ] = dim2 (mat:('a, 'b, 'c) Matrix.t)

Example: 
[] let f = fmatrix ~dim:[5;4;3] () ;; 
val f : (float, '_a, '_b) Matrix.t = <abstr> 
[] let fsize = dim2 f ;; 
val fsize : int array = [|5; 4; 3|]

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