Difference between revisions of "Element Command"
From GeoGebra Manual
Line 10: | Line 10: | ||
: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. | + | {{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== | ||
;Element[List, Number n] | ;Element[List, Number n] |
Revision as of 09:46, 8 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, 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 {{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, 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 {{1, 3, 2}, {0, 3, -2}}.