MATLAB® Getting Started Guide - The MathWorks - #151

Other Data Structures

is a 1-by-4-by-24 array containing 24 copies of the row vector

34 34 34 34 and

sum(M,2)

is a 4-by-1-by-24 array containing 24 copies ofthe column vector

34 34 34 34

Finally,

S = sum(M,3)

adds the 24 matrices in the sequence. The result has size 4-by-4-by-1, so it looks like a 4-by-4 array:

S =

204 204 204

204 204 204 204 204 204 204 204 204

204 204 204 204

Cell arrays in MATLAB are multidimensional arrays whose elements are copies of other arrays. A cell array of empty matrices can be created with the cell function. But, more often, cell arrays are created by enclosing a miscellaneous collection of things in curly braces, {}. The curly braces are also used with subscripts to access the contents ofvarious cells. For example,

C = {A sum(A) prod(prod(A))}

produces a 1-by-3 cell array. The three cells contain the magic square, the row vector of column sums, and the product of all its elements. When C is displayed, you see

C=

4-11