Element Command

Element[List, Number n]

Yields the n^th element of the list.

Example:

Element[{1, 3, 2}, 2] gives 3, the second element of {1, 3, 2}.

Element[Matrix, Row, Column]

Yields the element of the matrix in the given row and column.

Example:

Element[{{1, 3, 2}, {0, 3, -2}}, 2, 3] gives -2, the third element of the second row of \begin{pmatrix}1&3&2\\0&3&-2\end{pmatrix}.

Element[List L, Index1, Index2, ...]

Provided L is n-dimensional list, one can specify up to n indices to obtain an element (or list of elements) at given coordinates.

Example:

Let L={{{1,2},{3,4}},{{5,6},{7,8}}}. Then Element[L,1,2,1] returns 3, Element[L,2,2] returns {7, 8}.

Note: For this command to work, the list or matrix can contain elements of one object type only (e. g. only numbers or only points).

CAS Syntax

Element[List, Number n]

Yields the n^th element of the list.

Example:

Element[{a, b, c}, 2] gives b, the second element of {a, b, c}.

Element[Matrix, Row, Column]

Yields the element of the matrix in the given row and column.

Example:

Element[{{a, b, c}, {d, e, f}}, 2, 3] gives f, the third element of the second row of\begin{pmatrix}a&b&c\\d&e&f\end{pmatrix}.

Note:

See also First Command, Last Command and RandomElement Command.