colon — (:) colon operator
Colon symbol :
can be used to form implicit
vectors. (see also linspace, logspace)
is the vector [j, j+1,...,k]
(empty if
j>k
).
is the vector [j, j+d, ..., j+m*d]
The colon notation can also be used to pick out selected rows, columns and elements of vectors and matrices (see also extraction,insertion)
is the vector of all the elements of A
regarded as a single column.
ys the j
-th column of A
is [A(j),A(j+1),...,A(k)]
is
[A(:,j),A(:,j+1),...,A(:,k)]
fills the matrix A
with entries of w
(taken column by column if w
is a matrix).