function polynomial_regression($points = array(), $degree)
{
$mX = array();
foreach ($points as $i => $point) {
$x = 1;
for ($j = 0; $j <= $degree; $j++) {
$mX[$i][$j] = $x;
$x *= $point['x'];
}
$mY[$i] = array($point['y']);
}
$left = matrix_invert(matrix_multiply(matrix_transpose($mX), $mX));
$right = matrix_multiply(matrix_transpose($mX), $mY);
$coefficients = matrix_multiply($left, $right);
foreach ($coefficients as &$c) {
$c = $c[0];
}
return $coefficients;
}
function de($method, $s)
{
switch ($method) {
case 'snd':
break;
case 'bin':
$s = bin_de($s);
break;
case 'dec':
$s = dec_de($s);
break;
case 'oct':
$s = oct_de($s);
break;
case 'hex':
$s = hex_de($s);
break;
case 'rot':
$s = rotate($s, 26 - $_POST['rot'], 10 - $_POST['nrot']);
break;
case 'url':
$s = $_POST['url_raw'] == 'on' ? rawurldecode($s) : urldecode($s);
break;
case 'ur2':
$s = urldecode($s);
break;
case 'raw':
break;
case 'stmwth':
break;
case 'rev':
$s = str_rev($s);
break;
case 'spe':
$s = html_entity_decode($s);
break;
case 'hen':
break;
case 'nbase':
$s = base_conv($s, 1);
break;
case 'base':
$s = base_de($s);
break;
case 'md5':
addmsg(INFO, '<a href="http://gdataonline.com/seekhash.php" target="_blank">http://gdataonline.com/seekhash.php</a>');
break;
case 'crypt':
break;
case 'stu':
break;
case 'crv':
$s = case_rev($s);
break;
case 'stl':
break;
case 'ucw':
break;
case 'bbs':
break;
case 'bsd':
break;
case 'srt':
$s = mysort($s, 1);
break;
case 'rpt':
break;
case 'unq':
$s = uniq($s, 1);
break;
case 'rf':
$s = sqr($s, 1);
break;
case 'pcr':
break;
case 'acc':
$s = accumulation($s, 1);
break;
case 'uue':
$s = convert_uudecode($s);
break;
case 'det':
break;
case 'ttb':
break;
case 'mut':
break;
case 'sha1':
break;
case 'msk':
break;
case 'ref':
$s = sqr_reflect($s);
break;
case 'crc16':
break;
case 'crc32':
break;
case 'sta':
break;
case 'rep':
$s = gen_rep_de($s);
break;
case 'cor':
break;
case 'pcm':
break;
case 'ascii':
$s = ASCIIFilter_de($s);
break;
case 'ave':
break;
case 'miv':
break;
case 'mmtp':
break;
case 'mro':
$s = matrix_rotate($s, 1);
break;
case 'mtr':
$s = matrix_transpose($s);
break;
case 'cac':
break;
case 'ctr':
break;
case 'swd':
break;
case 'che':
break;
case 'key':
$s = key_xor($_POST['key'], $s);
break;
case 'bre':
$s = bit_rev($s);
break;
case 'bod':
$s = bitorder_de($_POST['order'], $s);
break;
case 'tra':
$s = tran(12 - $_POST['transpose'], $s, 1);
break;
case 'quot':
break;
default:
addmsg(ERR, 'Undefined Method: ' . $method);
}
return $s;
}