MATRIXDEF: Difference between revisions

From iMath
Jump to navigation Jump to search
No edit summary
mNo edit summary
 
(One intermediate revision by the same user not shown)
Line 7: Line 7:
|
|
2=
2=
Defines the symbol to be a (two-dimensional) matrix. This is important because matrices are non-commutative when evaluating an expression.
Declares the symbol to be a (two-dimensional) matrix. This is important because matrices are non-commutative when evaluating an expression.


The second form is a shortcut for the combination of <code>MATRIXDEF</code> and <code>[[EQDEF]]</code>. It defines the symbol and creates an equation defining its value.
The second form is a shortcut for the combination of <code>MATRIXDEF</code> and <code>[[EQDEF]]</code>. It defines the symbol and creates an equation defining its value.
Line 14: Line 14:
<code>MATRIXDEF M</code>
<code>MATRIXDEF M</code>


<code>MATRIXDEF N = MATRIX{ a # b # c ## d # e # f ## g# h# i }</code>
<code>@matrix@ MATRIXDEF M = left(MATRIX{ a # b # c ## d # e # f ## g# h# i }right)</code>


Defines two matrices <code>M</code> and <code>N</code> and assigns a value to <code>N</code>. In expression evaluation, iMath will treat the matrices as non-commutative, that is, <code>M N &ne; N M</code>.
Declares two matrices <code>M</code> and <code>N</code> and assigns a value to <code>N</code>. In expression evaluation, iMath will treat the matrices as non-commutative, that is, <code>M N &ne; N M</code>.
|
|
4=
4=
[[VECTORDEF]]
[[VECTORDEF]]
}}
}}
[[Category:Definition]]
[[Category:Declaration]][[Category:Definition]]

Latest revision as of 16:35, 4 January 2023

Syntax

MATRIXDEF symbol

@label@ { options } MATRIXDEF [*] symbol = expression

Implemented in iMath since version 2.2.0 or earlier.

Explanation

Declares the symbol to be a (two-dimensional) matrix. This is important because matrices are non-commutative when evaluating an expression.

The second form is a shortcut for the combination of MATRIXDEF and EQDEF. It defines the symbol and creates an equation defining its value.

Example

MATRIXDEF M

@matrix@ MATRIXDEF M = left(MATRIX{ a # b # c ## d # e # f ## g# h# i }right)

Declares two matrices M and N and assigns a value to N. In expression evaluation, iMath will treat the matrices as non-commutative, that is, M N ≠ N M.

See also

VECTORDEF