Using the C Math Library    

Selecting the Entire Matrix As a Column Vector 

Use the colon index to select all the elements in an array. The result is a column vector. For example,

is:

The colon index means ``all.'' It is a context-sensitive function. It expands to a vector array containing all the indices of the dimension in which it is used (its context). In the context of an M-by-N array A, A(:) in MATLAB notation is equivalent to A([1:M*N]'). When you use colon, you don't have to specify M and N explicitly, which is convenient when you don't know M and N.


 Selecting a Matrix N-Dimensional Indexing