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Developer Documentation
- Bug fixes for general core bugs in 3.11.x will end 14 Nov 2022 (12 months plus 6 months extension).
- Bug fixes for security issues in 3.11.x will end 13 Nov 2023 (18 months plus 12 months extension).
- PHP version: minimum PHP 7.3.0 Note: minimum PHP version has increased since Moodle 3.10. PHP 7.4.x is supported too.
Differences Between: [Versions 310 and 311] [Versions 311 and 400] [Versions 311 and 401] [Versions 39 and 311]
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| File Size: | 1202 lines (37 kb) |
| Included or required: | 0 times |
| Referenced: | 0 times |
| Includes or requires: | 0 files |
Defines 1 class
Matrix:: (31 methods):
__construct()
getArray()
getRowDimension()
getColumnDimension()
get()
getMatrix()
checkMatrixDimensions()
set()
identity()
diagonal()
getMatrixByRow()
getMatrixByCol()
transpose()
trace()
uminus()
plus()
plusEquals()
minus()
minusEquals()
arrayTimes()
arrayTimesEquals()
arrayRightDivide()
arrayRightDivideEquals()
arrayLeftDivide()
arrayLeftDivideEquals()
times()
power()
concat()
solve()
inverse()
det()
Matrix class.
| __construct(...$args) X-Ref |
| Polymorphic constructor. As PHP has no support for polymorphic constructors, we use tricks to make our own sort of polymorphism using func_num_args, func_get_arg, and gettype. In essence, we're just implementing a simple RTTI filter and calling the appropriate constructor. |
| getArray() X-Ref |
| getArray. return: array Matrix array |
| getRowDimension() X-Ref |
| getRowDimension. return: int Row dimension |
| getColumnDimension() X-Ref |
| getColumnDimension. return: int Column dimension |
| get($i = null, $j = null) X-Ref |
| get. Get the i,j-th element of the matrix. param: int $i Row position param: int $j Column position return: mixed Element (int/float/double) |
| getMatrix(...$args) X-Ref |
| getMatrix. Get a submatrix return: Matrix Submatrix |
| checkMatrixDimensions($B = null) X-Ref |
| checkMatrixDimensions. Is matrix B the same size? param: Matrix $B Matrix B return: bool |
| set($i = null, $j = null, $c = null) X-Ref |
| set. Set the i,j-th element of the matrix. param: int $i Row position param: int $j Column position param: mixed $c Int/float/double value return: mixed Element (int/float/double) |
| identity($m = null, $n = null) X-Ref |
| identity. Generate an identity matrix. param: int $m Row dimension param: int $n Column dimension return: Matrix Identity matrix |
| diagonal($m = null, $n = null, $c = 1) X-Ref |
| diagonal. Generate a diagonal matrix param: int $m Row dimension param: int $n Column dimension param: mixed $c Diagonal value return: Matrix Diagonal matrix |
| getMatrixByRow($i0 = null, $iF = null) X-Ref |
| getMatrixByRow. Get a submatrix by row index/range param: int $i0 Initial row index param: int $iF Final row index return: Matrix Submatrix |
| getMatrixByCol($j0 = null, $jF = null) X-Ref |
| getMatrixByCol. Get a submatrix by column index/range param: int $j0 Initial column index param: int $jF Final column index return: Matrix Submatrix |
| transpose() X-Ref |
| transpose. Tranpose matrix return: Matrix Transposed matrix |
| trace() X-Ref |
| trace. Sum of diagonal elements return: float Sum of diagonal elements |
| uminus() X-Ref |
| uminus. Unary minus matrix -A return: Matrix Unary minus matrix |
| plus(...$args) X-Ref |
| plus. A + B return: Matrix Sum |
| plusEquals(...$args) X-Ref |
| plusEquals. A = A + B return: $this |
| minus(...$args) X-Ref |
| minus. A - B return: Matrix Sum |
| minusEquals(...$args) X-Ref |
| minusEquals. A = A - B return: $this |
| arrayTimes(...$args) X-Ref |
| arrayTimes. Element-by-element multiplication Cij = Aij * Bij return: Matrix Matrix Cij |
| arrayTimesEquals(...$args) X-Ref |
| arrayTimesEquals. Element-by-element multiplication Aij = Aij * Bij return: $this |
| arrayRightDivide(...$args) X-Ref |
| arrayRightDivide. Element-by-element right division A / B return: Matrix Division result |
| arrayRightDivideEquals(...$args) X-Ref |
| arrayRightDivideEquals. Element-by-element right division Aij = Aij / Bij return: Matrix Matrix Aij |
| arrayLeftDivide(...$args) X-Ref |
| arrayLeftDivide. Element-by-element Left division A / B return: Matrix Division result |
| arrayLeftDivideEquals(...$args) X-Ref |
| arrayLeftDivideEquals. Element-by-element Left division Aij = Aij / Bij return: Matrix Matrix Aij |
| times(...$args) X-Ref |
| times. Matrix multiplication return: Matrix Product |
| power(...$args) X-Ref |
| power. A = A ^ B return: $this |
| concat(...$args) X-Ref |
| concat. A = A & B return: $this |
| solve($B) X-Ref |
| Solve A*X = B. param: Matrix $B Right hand side return: Matrix ... Solution if A is square, least squares solution otherwise |
| inverse() X-Ref |
| Matrix inverse or pseudoinverse. return: Matrix ... Inverse(A) if A is square, pseudoinverse otherwise. |
| det() X-Ref |
| det. Calculate determinant return: float Determinant |
