Difference between revisions of "Identity Command"
From GeoGebra Manual
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<noinclude>{{Manual Page|version=5.0}}</noinclude>{{command|cas=true|vector-matrix}} | <noinclude>{{Manual Page|version=5.0}}</noinclude>{{command|cas=true|vector-matrix}} | ||
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;Identity[ <Number> ] | ;Identity[ <Number> ] | ||
:Gives the identity matrix of the given order. | :Gives the identity matrix of the given order. | ||
:{{example|1=<div><code><nowiki>Identity[3]</nowiki></code> yields the matrix ''<math>\begin{pmatrix}1&0&0\\0&1&0\\0&0&1\end{pmatrix}</math>''.</div>}} | :{{example|1=<div><code><nowiki>Identity[3]</nowiki></code> yields the matrix ''<math>\begin{pmatrix}1&0&0\\0&1&0\\0&0&1\end{pmatrix}</math>''.</div>}} | ||
{{note|1=If ''A'' is a square matrix of order ''n'', <code><nowiki>A^0</nowiki></code> yields the same as <code><nowiki>Identity[n]</nowiki></code>.}} | {{note|1=If ''A'' is a square matrix of order ''n'', <code><nowiki>A^0</nowiki></code> yields the same as <code><nowiki>Identity[n]</nowiki></code>.}} |
Revision as of 14:03, 26 August 2015
- Identity[ <Number> ]
- Gives the identity matrix of the given order.
- Example:
Identity[3]
yields the matrix \begin{pmatrix}1&0&0\\0&1&0\\0&0&1\end{pmatrix}.
Note: If A is a square matrix of order n,
A^0
yields the same as Identity[n]
.