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