MATRIXDEF: Difference between revisions
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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. | ||
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<code>MATRIXDEF N = MATRIX{ a # b # c ## d # e # f ## g# h# i }</code> | <code>MATRIXDEF N = MATRIX{ a # b # c ## d # e # f ## g# h# i }</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 ≠ N M</code>. | |||
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4= | 4= | ||
[[VECTORDEF]] | [[VECTORDEF]] | ||
}} | }} | ||
[[Category:Definition]] | [[Category:Declaration]][[Category:Definition]] | ||
Revision as of 17:49, 21 September 2018
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
MATRIXDEF N = MATRIX{ a # b # c ## d # e # f ## g# h# i }
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.