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79 lines
1.4 KiB
PHP
79 lines
1.4 KiB
PHP
<?php
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include "../Matrix.php";
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/**
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* Tiling of matrix X in [rowWise by colWise] dimension. Tiling
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* creates a larger matrix than the original data X. Example, if
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* X is to be tiled in a [3 x 4] manner, then:
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*
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* / \
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* | X X X X |
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* C = | X X X X |
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* | X X X X |
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* \ /
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*
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* @param X Matrix
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* @param rowWise int
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* @param colWise int
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* @return Matrix
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*/
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function tile(&$X, $rowWise, $colWise){
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$xArray = $X->getArray();
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print_r($xArray);
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$countRow = 0;
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$countColumn = 0;
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$m = $X->getRowDimension();
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$n = $X->getColumnDimension();
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if( $rowWise<1 || $colWise<1 ){
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die("tile : Array index is out-of-bound.");
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}
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$newRowDim = $m*$rowWise;
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$newColDim = $n*$colWise;
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$result = array();
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for($i=0 ; $i<$newRowDim; ++$i) {
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$holder = array();
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for($j=0 ; $j<$newColDim ; ++$j) {
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$holder[$j] = $xArray[$countRow][$countColumn++];
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// reset the column-index to zero to avoid reference to out-of-bound index in xArray[][]
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if($countColumn == $n) { $countColumn = 0; }
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} // end for
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++$countRow;
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// reset the row-index to zero to avoid reference to out-of-bound index in xArray[][]
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if($countRow == $m) { $countRow = 0; }
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$result[$i] = $holder;
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} // end for
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return new Matrix($result);
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}
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$X =array(1,2,3,4,5,6,7,8,9);
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$nRow = 3;
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$nCol = 3;
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$tiled_matrix = tile(new Matrix($X), $nRow, $nCol);
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echo "<pre>";
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print_r($tiled_matrix);
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echo "</pre>";
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?>
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