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>''.}} | ||
Revision as of 13:52, 10 September 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.
