Difference between revisions of "Identity Command"
From GeoGebra Manual
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; Identity[Number n]: Returns the identity matrix with the given order (<math>n\times n</math>). | ; Identity[Number n]: Returns the identity matrix with the given order (<math>n\times n</math>). | ||
:{{Example|1= <code>Identity[3]</code> gives you the matrix ''<math>\begin{pmatrix}1&0&0\\0&1&0\\0&0&1\end{pmatrix}</math>''.}} | :{{Example|1= <code>Identity[3]</code> gives you the matrix ''<math>\begin{pmatrix}1&0&0\\0&1&0\\0&0&1\end{pmatrix}</math>''.}} | ||
| − | :{{Note|1=If ''A'' is a square matrix of order ''n'', <code>A^0</code> produces the same matrix as <code>Identity[n]</code>. | + | :{{Note|1=If ''A'' is a square matrix of order ''n'', <code>A^0</code> produces the same matrix as <code>Identity[n]</code>.<br>This command is not dynamic. ie <code>Identity[a]</code> will not change when '''a''' is changed.}} |
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==CAS Syntax== | ==CAS Syntax== | ||
;Identity[Number]: Returns the identity matrix with the given order. | ;Identity[Number]: Returns the identity matrix with the given order. | ||
Revision as of 20:13, 23 August 2011
- Identity[Number n]
- Returns the identity matrix with the given order (n\times n).
- Example:
Identity[3]gives you 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^0produces the same matrix asIdentity[n].
This command is not dynamic. ieIdentity[a]will not change when a is changed.
CAS Syntax
- Identity[Number]
- Returns the identity matrix with the given order.
