colon (:) - colon operator

Description

: : Colon. Used in subscripts and loops.

j:k is the vector

(empty if J>K).

j:d:k is the vector

The colon notation can also be used to pick out selected rows, columns and elements of vectors and matrices.

A(:) is the vector of all the elements of A regarded as a single column.

A(:,j) is the j-th column of A

A(j:k) is

A(:,j:k) is

A(:)=w fills the matrix A with entries of w (taken column by column if w is a matrix).

See Also

matrix