MATRIXDEF: Difference between revisions
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<code>MATRIXDEF M</code> | <code>MATRIXDEF M</code> | ||
<code>MATRIXDEF | <code>@matrix@ MATRIXDEF M = left(MATRIX{ a # b # c ## d # e # f ## g# h# i }right)</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>. | 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>. | ||
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.