Difference between revisions of "Element Command"
From GeoGebra Manual
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;Element[List, Number n] | ;Element[List, Number n] | ||
:Yields the ''n''<sup>th</sup> element of the list. | :Yields the ''n''<sup>th</sup> element of the list. | ||
| + | :{{example| 1=<div><code><nowiki>Element[{1, 3, 2}, 2]</nowiki></code> gives ''3'', the second element of ''{1, 2, 3}''.</div>}} | ||
;Element[Matrix, Row, Column] | ;Element[Matrix, Row, Column] | ||
:Yields the element of the matrix in the given row and column. | :Yields the element of the matrix in the given row and column. | ||
| + | :{{example| 1=<div><code><nowiki>Element[{{1, 3, 2}, {0, 3, -2}}, 2, 3]</nowiki></code> gives ''-2'', the third element of the second row of ''{{1, 3, 2}, {0, 3, -2}}''.</div>}} | ||
;Element[List L, Index1, Index2, ...] | ;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. | :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|1=<div>Let <nowiki>L={{{1,2},{3,4}},{{5,6},{7,8}}}</nowiki>. Then <code><nowiki>Element[L,1,2,1]</nowiki></code> returns 3, <code><nowiki>Element[L,2,2]</nowiki></code> returns {7,8}.</div>}} | + | :{{example|1=<div>Let <nowiki>L={{{1,2},{3,4}},{{5,6},{7,8}}}</nowiki>. Then <code><nowiki>Element[L,1,2,1]</nowiki></code> returns 3, <code><nowiki>Element[L,2,2]</nowiki></code> returns {7,8}.</div>}} |
{{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.}} | {{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== | ==CAS Syntax== | ||
Revision as of 10:50, 5 August 2011
- Element[List, Number n]
- Yields the nth element of the list.
- Example:
Element[{1, 3, 2}, 2]gives 3, the second element of {1, 2, 3}.
- 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 {{1, 3, 2}, {0, 3, -2}}.
- 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 nth element of the list.
- Example:
Element[{1, 3, 2}, 2]gives 3, the second element of {1, 2, 3}.
- 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 {{1, 3, 2}, {0, 3, -2}}.
