tile.php File Reference

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Functions
	tile (&$X, $rowWise, $colWise)
	Tiling of matrix X in [rowWise by colWise] dimension.

Variables
	$X = array(1,2,3,4,5,6,7,8,9)
	$nRow = 3
	$nCol = 3
	$tiled_matrix = tile(new Matrix($X), $nRow, $nCol)

Function Documentation

tile	(	&	$X,
			$rowWise,
			$colWise
	)

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 | \ /

Parameters

X	Matrix
rowWise	int
colWise	int

Returns

Matrix

Definition at line 22 of file tile.php.

References $X.

                                      {

  $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);

}

Variable Documentation

$nCol = 3

Definition at line 73 of file tile.php.

$nRow = 3

Definition at line 72 of file tile.php.

$tiled_matrix = tile(new Matrix($X), $nRow, $nCol)

Definition at line 74 of file tile.php.

$X = array(1,2,3,4,5,6,7,8,9)

Definition at line 71 of file tile.php.