private function calDistance($from = 1, $to = 2)
{
$x = self::$pos[$from][0] - self::$pos[$to][0];
$y = self::$pos[$from][1] - self::$pos[$to][1];
$key = "{$x}->{$y}";
if (!isset(self::$dis_cache[$key])) {
self::$dis_cache[$key] = round(hypot(abs($x), abs($y)), 2);
//近似计算
}
return self::$dis_cache[$key];
}
/**
* @param $y
* @return $this
* @desc 计算直角三角形的斜边长度。
*/
public function hypot($y)
{
$this->current = hypot($this->toDouble(), doubleval($y));
return $this;
}
public function distance(Point $other)
{
return hypot($this->x - $other->x, $this->y - $other->y);
}
<?php
define("MAX_64Bit", 9223372036854775807);
define("MAX_32Bit", 2147483647);
define("MIN_64Bit", -9223372036854775807 - 1);
define("MIN_32Bit", -2147483647 - 1);
$longVals = array(MAX_64Bit, MIN_64Bit, MAX_32Bit, MIN_32Bit, MAX_64Bit - MAX_32Bit, MIN_64Bit - MIN_32Bit, MAX_32Bit + 1, MIN_32Bit - 1, MAX_32Bit * 2, MAX_32Bit * 2 + 1, MAX_32Bit * 2 - 1, MAX_64Bit - 1, MAX_64Bit + 1, MIN_64Bit + 1, MIN_64Bit - 1);
$otherVals = array(0, 1, -1, 7, 9, 65, -44, MAX_32Bit, MIN_32Bit, MAX_64Bit, MIN_64Bit);
foreach ($longVals as $longVal) {
foreach ($otherVals as $otherVal) {
echo "--- testing: {$longVal}, {$otherVal} ---\n";
var_dump(hypot($longVal, $otherVal));
}
}
?>
===DONE===
/**
* Method to calculate the points and data of a triangle.
*
* @param array $point
* @param array $center
* @param int $quad
* @return array
*/
protected function getTriangle($point, $center, $quad)
{
$tri = array();
switch ($quad) {
case 1:
$tri['side1'] = $point['x'] - $center['x'];
$tri['side2'] = abs($point['y'] - $center['y']);
break;
case 2:
$tri['side1'] = $center['x'] - $point['x'];
$tri['side2'] = abs($point['y'] - $center['y']);
break;
case 3:
$tri['side1'] = $center['x'] - $point['x'];
$tri['side2'] = abs($center['y'] - $point['y']);
break;
case 4:
$tri['side1'] = $point['x'] - $center['x'];
$tri['side2'] = abs($center['y'] - $point['y']);
break;
}
$tri['hypot'] = round(hypot($tri['side1'], $tri['side2']));
$tri['angle1'] = round(rad2deg(asin($tri['side2'] / $tri['hypot'])));
$tri['angle2'] = round(rad2deg(asin($tri['side1'] / $tri['hypot'])));
return $tri;
}
/**
* @param float $x A number
* @param float $y A number
* @param float $z_ Optional variable list of additional numbers
* @return float The square root of the sum of squares of the arguments
*/
public function hypot($x, $y, $z_ = null)
{
if ($z_ === null) {
return hypot($x, $y);
}
$sum = 0;
foreach (func_get_args() as $value) {
$sum += $value * $value;
}
return sqrt($sum);
}
* Description: Calculate the length of the hypotenuse of a right-angle triangle
* Source code: ext/standard/math.c
*/
echo "*** Testing hypot() : usage variations ***\n";
//get an unset variable
$unset_var = 10;
unset($unset_var);
// heredoc string
$heredoc = <<<EOT
abc
xyz
EOT;
// get a class
class classA
{
}
// get a resource variable
$fp = fopen(__FILE__, "r");
// unexpected values to be passed to $arg argument
$inputs = array(0, 1, 12345, -2345, 2147483647, 10.5, -10.5, 123456789000.0, 1.23456789E-9, 0.5, NULL, null, true, false, TRUE, FALSE, "", '', array(), "abcxyz", 'abcxyz', $heredoc, new classA(), @$undefined_var, @$unset_var, $fp);
// loop through each element of $inputs to check the behaviour of hypot()
$iterator = 1;
foreach ($inputs as $input) {
echo "\n-- Iteration {$iterator} --\n";
var_dump(hypot(3, $input));
$iterator++;
}
fclose($fp);
?>
===Done===
/**
* Calcula o tamanho da hipotenusa de um ângulo reto do triângulo Retorna a raiz quadrada de (num1*num1 + num2*num2)
* @return Number
*/
public function hypot($x = 0, $y = 0)
{
if ($x == 0) {
$x = $this->num;
}
$this->num = hypot($x, $y);
return $this;
}
protected function _MATH_HYPOT($elem)
{
return hypot($elem['X'], $elem['Y']);
}
/**
*
*/
public function getHipotenuseValue($left, $right)
{
try {
self::numberLeftVerify($left);
self::numberRightVerify($right);
$this->lastOutputValue = hypot($this->calcLeftNumber, $this->calcRightNumber);
return $this->lastOutputValue;
} catch (Exception $e) {
echo "Erro linha: " . $e->getLine() . " - Desc: " . $e->getMessage() . "- Arquivo:" . $e->getFile();
}
}
/**
* Calculates the inverse sine of a complex number: z = asinAlt(c1)
* Uses an alternative algorithm
*
* @param Math_Complex $c1
* @return Math_Complex A valid Math_Complex number on success
* @throws InvalidArgumentException
*/
public static function asinAlt(Math_Complex $c1)
{
if (!Math_ComplexOp::isComplex($c1)) {
throw new InvalidArgumentException('argument is not a Math_Complex object');
}
$r = $c1->getReal();
$i = $c1->getIm();
if ($i == 0) {
return Math_ComplexOp::asinReal($r);
} else {
$x = abs($r);
$y = abs($i);
$r = hypot($x + 1, $y);
$s = hypot($x - 1, $y);
$a = ($r + $s) / 2;
$b = $x / $a;
$y2 = $y * $y;
$ac = 1.5;
$bc = 0.6417;
// crossover values
if ($b <= $bc) {
$real = asin($b);
} else {
if ($x <= 1) {
$d = 0.5 * ($a + $x) * ($y2 / ($r + $x + 1) + ($s + (1 - $x)));
$real = atan2($x, sqrt($d));
} else {
$ax = $a + $x;
$d = 0.5 * ($ax / ($r + $x + 1) + $ax / ($s + ($x - 1)));
$real = atan2($x, $y * sqrt($d));
}
}
if ($a <= $ac) {
if ($x < 1) {
$m = 0.5 * ($y2 / ($r + ($x + 1)) + $y2 / ($s + (1 - $x)));
} else {
$m = 0.5 * ($y2 / ($r + ($x + 1)) + ($s + ($x - 1)));
}
$im = log1p($m + sqrt($m * ($a + 1)));
} else {
$im = log($a + sqrt($a * $a - 1));
}
$real = $r >= 0 ? $real : -1 * $real;
$im = $i >= 0 ? $im : -1 * $im;
return new Math_Complex($real, $im);
}
}
VC(pow("2", "8"), 256);
VC(pow("-1", "20"), 1);
var_dump(pow("0", "0"));
var_dump(is_int(pow("2", "32")));
VC(exp(12), 162754.791419);
VC(exp(5.7), 298.86740096706);
VC(expm1(5.7), 297.8674);
var_dump(log10(10));
var_dump(log10(100));
VC(log1p(9), 2.302585092994);
VC(log1p(99), 4.6051701859881);
VC(log(8), 2.0794415416798);
var_dump(log(8, 2));
VC(cos(M_PI), -1);
VC(cosh(1.23), 1.8567610569853);
VC(sin(deg2rad(90)), 1);
VC(sinh(1.23), 1.5644684793044);
VC(tan(deg2rad(45)), 1);
VC(tanh(1.23), 0.84257932565893);
VC(acos(-1), M_PI);
VC(acosh(1.8567610569853), 1.23);
VC(asin(1), deg2rad(90));
VC(asinh(1.5644684793044), 1.23);
VC(atan(1), deg2rad(45));
VC(atanh(0.84257932565893), 1.23);
VC(atan2(3, 4), 0.64350110879328);
var_dump(hypot(3, 4));
var_dump(fmod(5.7, 1.3));
var_dump(sqrt(9));
var_dump(getrandmax());
var_dump(mt_getrandmax());
<?php /* Prototype : float hypot ( float $x , float $y ) * Description: Calculate the length of the hypotenuse of a right-angle triangle. * Source code: ext/standard/math.c */ echo "*** Testing hypot() : error conditions ***\n"; echo "\n-- Testing hypot() function with less than expected no. of arguments --\n"; hypot(); hypot(36); echo "\n-- Testing hypot() function with more than expected no. of arguments --\n"; hypot(36, 25, 0); ?> ===Done===
/**
* Modulus (absolute value)
*
* Return the modulus of the complex number z=x+iy, i.e.
* sqrt(x^2 + y^2)
*
* @retval float modulus
*/
public function abs()
{
return hypot($this->x, $this->y);
}
/**
* This method returns the length of the hypotenuse of a right-angle triangle.
*
* @access public
* @static
* @param IReal\Type $x the left operand
* @param IReal\Type $y the right operand
* @return IDouble\Type the result
*/
public static function hypot(IReal\Type $x, IReal\Type $y) : IDouble\Type
{
return IDouble\Type::box(hypot($x->unbox(), $y->unbox()));
}
public function __construct(Matrix $_matrix)
{
$this->l_matrix = $_matrix;
$m = $_matrix->u_size;
$n = $_matrix->u_stride;
/*if($m < $n)
{
return;
}*/
$a = clone $this->l_matrix->u_data;
/*$nu = min($m, $n);*/
$this->l_singular = new Vector($sl = min($m + 1, $n));
$s = $this->l_singular->u_data;
$this->l_left = new Matrix($um = $m, $un = $m);
$u = $this->l_left->u_data;
$this->l_right = new Matrix($vm = $n, $vn = $n);
$v = $this->l_right->u_data;
$e = arrayFill($n, 0.0);
$work = arrayFill($m, 0.0);
$wantu = true;
$wantv = true;
/* Reduce A to bidiagonal form, storing the diagonal elements in s and the super-diagonal elements in e. */
$nct = min($m - 1, $n);
$nrt = max(0, min($n - 2, $m));
$kmax = max($nct, $nrt);
for ($k = 0; $k < $kmax; $k++) {
if ($k < $nct) {
/*
Compute the transformation for the k-th column and place the k-th diagonal in s[k].
Compute 2-norm of k-th column without under/overflow.
*/
$s[$k] = 0.0;
for ($i = $k; $i < $m; $i++) {
$s[$k] = hypot($s[$k], $a[$i * $n + $k]);
}
if (compare($s[$k], 0)) {
if ($a[$pos = $k * $n + $k] < 0) {
$s[$k] = -$s[$k];
}
for ($i = $k; $i < $m; $i++) {
$a[$i * $n + $k] /= (double) $s[$k];
/* Division */
}
$a[$pos] += 1.0;
}
$s[$k] = -$s[$k];
}
for ($j = $k + 1; $j < $n; $j++) {
if ($k < $nct && compare($s[$k], 0)) {
/* Apply the transformation. */
$t = 0.0;
for ($i = $k; $i < $m; $i++) {
$t += $a[$i * $n + $k] * $a[$i * $n + $j];
}
$t = -$t / (double) $a[$k * $n + $k];
/* Division */
for ($i = $k; $i < $m; $i++) {
$a[$i * $n + $j] += $t * $a[$i * $n + $k];
}
}
/* Place the k-th row of A into e for the subsequent calculation of the row transformation. */
$e[$j] = $a[$k * $n + $j];
}
if ($wantu && $k < $nct) {
/* Place the transformation in U for subsequent back multiplication. */
for ($i = $k; $i < $m; $i++) {
$u[$i * $un + $k] = $a[$i * $n + $k];
}
}
if ($k < $nrt) {
/* Compute the k-th row transformation and place the k-th super-diagonal in e[k]. Compute 2-norm without under/overflow. */
$e[$k] = 0.0;
for ($i = $k + 1; $i < $n; $i++) {
$e[$k] = hypot($e[$k], $e[$i]);
}
if (compare($e[$k], 0)) {
if ($e[$k + 1] < 0) {
$e[$k] = -$e[$k];
}
for ($i = $k + 1; $i < $n; $i++) {
$e[$i] /= (double) $e[$k];
/* Division */
}
$e[$k + 1] += 1.0;
}
$e[$k] = -$e[$k];
if ($k + 1 < $m && compare($e[$k], 0)) {
/* Apply the transformation. */
for ($i = $k + 1; $i < $m; $i++) {
$work[$i] = 0.0;
}
for ($j = $k + 1; $j < $n; $j++) {
for ($i = $k + 1; $i < $m; $i++) {
$work[$i] += $e[$j] * $a[$i * $n + $j];
}
}
for ($j = $k + 1; $j < $n; $j++) {
$t = -$e[$j] / (double) $e[$k + 1];
/* Division */
for ($i = $k + 1; $i < $m; $i++) {
$a[$i * $n + $j] += $t * $work[$i];
}
}
}
if ($wantv) {
/* Place the transformation in V for subsequent back multiplication. */
for ($i = $k + 1; $i < $n; $i++) {
$v[$i * $vn + $k] = $e[$i];
}
}
}
}
/* Set up the final bidiagonal matrix or order p. */
$p = min($n, $m + 1);
if ($nct < $n) {
$s[$nct] = $a[$nct * $n + $nct];
}
if ($m < $p) {
$s[$p - 1] = 0.0;
}
if ($nrt + 1 < $p) {
$e[$nrt] = $a[$nrt * $n + $p - 1];
}
$e[$p - 1] = 0.0;
/* If required, generate U. */
if ($wantu) {
for ($j = $nct; $j < $m; $j++) {
for ($i = 0; $i < $m; $i++) {
$u[$i * $un + $j] = 0.0;
}
$u[$j * $un + $j] = 1.0;
}
for ($k = $nct - 1; $k >= 0; $k--) {
if (compare($s[$k], 0)) {
for ($j = $k + 1; $j < $m; $j++) {
$t = 0.0;
for ($i = $k; $i < $m; $i++) {
$t += $u[$i * $un + $k] * $u[$i * $un + $j];
}
$t = -$t / (double) $u[$k * $un + $k];
/* Division */
for ($i = $k; $i < $m; $i++) {
$u[$i * $un + $j] += $t * $u[$i * $un + $k];
}
}
for ($i = $k; $i < $m; $i++) {
$u[$pos = $i * $un + $k] = -$u[$pos];
}
$u[$pos = $k * $un + $k] = 1.0 + $u[$pos];
for ($i = 0; $i < $k - 1; $i++) {
$u[$i * $un + $k] = 0.0;
}
} else {
for ($i = 0; $i < $m; $i++) {
$u[$i * $un + $k] = 0.0;
}
$u[$k * $un + $k] = 1.0;
}
}
}
/* If required, generate V. */
if ($wantv) {
for ($k = $n - 1; $k >= 0; $k--) {
if ($k < $nrt && compare($e[$k], 0)) {
for ($j = $k + 1; $j < $n; $j++) {
$t = 0.0;
for ($i = $k + 1; $i < $n; $i++) {
$t += $v[$i * $vn + $k] * $v[$i * $vn + $j];
}
$t = -$t / (double) $v[($k + 1) * $vn + $k];
/* Division */
for ($i = $k + 1; $i < $n; $i++) {
$v[$i * $vn + $j] += $t * $v[$i * $vn + $k];
}
}
}
for ($i = 0; $i < $n; $i++) {
$v[$i * $vn + $k] = 0.0;
}
$v[$k * $vn + $k] = 1.0;
}
}
/* Main iteration loop for the singular values. */
$pp = $p - 1;
$iter = 0;
$eps = pow(2, -52);
$tiny = pow(2, -966);
while ($p > 0) {
$k = $kase = null;
/*
Here is where a test for too many iterations would go.
This section of the program inspects for negligible elements in the s and e arrays.
On completion the variables kase and k are set as follows.
kase = 1 if s(p) and e[k - 1] are negligible and k < p
kase = 2 if s(k) is negligible and k < p
kase = 3 if e[k - 1] is negligible, k < p, and s(k), ..., s(p) are not negligible (qr step).
kase = 4 if e(p - 1) is negligible (convergence).
*/
for ($k = $p - 2; $k >= -1; $k--) {
if ($k == -1) {
break;
}
if (compare(abs($e[$k]), $tiny + $eps * (abs($s[$k]) + abs($s[$k + 1]))) <= 0) {
$e[$k] = 0.0;
break;
}
}
if ($k == $p - 2) {
$kase = 4;
} else {
$ks = null;
for ($ks = $p - 1; $ks >= $k; $ks--) {
if ($ks == $k) {
break;
}
$t = ($ks != $p ? abs($e[$ks]) : 0) + ($ks != $k + 1 ? abs($e[$ks - 1]) : 0);
if (compare(abs($s[$ks]), $tiny + $eps * $t) <= 0) {
$s[$ks] = 0.0;
break;
}
}
if ($ks == $k) {
$kase = 3;
} else {
if ($ks == $p - 1) {
$kase = 1;
} else {
$kase = 2;
$k = $ks;
}
}
}
$k++;
/* Perform the task indicated by kase. */
switch ($kase) {
/* Deflate negligible s(p). */
case 1:
$f = $e[$p - 2];
$e[$p - 2] = 0.0;
for ($j = $p - 2; $j >= $k; $j--) {
$t = (double) hypot($s[$j], $f);
$cs = $s[$j] / $t;
/* Division */
$sn = $f / $t;
/* Division */
$s[$j] = $t;
if ($j != $k) {
$f = -$sn * $e[$j - 1];
$e[$j - 1] = $cs * $e[$j - 1];
}
if ($wantv) {
for ($i = 0; $i < $n; $i++) {
$t = $cs * $v[$ijpos = $i * $vn + $j] + $sn * $v[$ippos = $i * $vn + $p - 1];
$v[$ippos] = -$sn * $v[$ijpos] + $cs * $v[$ippos];
$v[$ijpos] = $t;
}
}
}
break;
/* Split at negligible s(k). */
/* Split at negligible s(k). */
case 2:
$f = $e[$k - 1];
$e[$k - 1] = 0.0;
for ($j = $k; $j < $p; $j++) {
$t = (double) hypot($s[$j], $f);
$cs = $s[$j] / $t;
/* Division */
$sn = $f / $t;
/* Division */
$s[$j] = $t;
$f = -$sn * $e[$j];
$e[$j] = $cs * $e[$j];
if ($wantu) {
for ($i = 0; $i < $m; $i++) {
$t = $cs * $u[$ijpos = $i * $un + $j] + $sn * $u[$ikpos = $i * $un + $k - 1];
$u[$ikpos] = -$sn * $u[$ijpos] + $cs * $u[$ikpos];
$u[$ijpos] = $t;
}
}
}
break;
/* Perform one qr step. */
/* Perform one qr step. */
case 3:
/* Calculate the shift. */
$scale = (double) max(max(max(max(abs($s[$p - 1]), abs($s[$p - 2])), abs($e[$p - 2])), abs($s[$k])), abs($e[$k]));
$sp = $s[$p - 1] / $scale;
/* Division */
$spm1 = $s[$p - 2] / $scale;
/* Division */
$epm1 = $e[$p - 2] / $scale;
/* Division */
$sk = $s[$k] / $scale;
/* Division */
$ek = $e[$k] / $scale;
/* Division */
$b = (($spm1 + $sp) * ($spm1 - $sp) + $epm1 * $epm1) / 2.0;
$c = $sp * $epm1 * ($sp * $epm1);
$shift = 0.0;
if (compare($b, 0) || compare($c, 0)) {
$shift = sqrt($b * $b + $c);
if ($b < 0) {
$shift = -$shift;
}
$shift = $c / (double) ($b + $shift);
/* Division */
}
$f = ($sk + $sp) * ($sk - $sp) + $shift;
$g = $sk * $ek;
/* Chase zeros. */
for ($j = $k; $j < $p - 1; $j++) {
$t = (double) hypot($f, $g);
$cs = $f / $t;
/* Division */
$sn = $g / $t;
/* Division */
if ($j != $k) {
$e[$j - 1] = $t;
}
$f = $cs * $s[$j] + $sn * $e[$j];
$e[$j] = $cs * $e[$j] - $sn * $s[$j];
$g = $sn * $s[$j + 1];
$s[$j + 1] = $cs * $s[$j + 1];
if ($wantv) {
for ($i = 0; $i < $n; $i++) {
$t = $cs * $v[$ijpos = $i * $vn + $j] + $sn * $v[$ij1pos = $i * $vn + $j + 1];
$v[$ij1pos] = -$sn * $v[$ijpos] + $cs * $v[$ij1pos];
$v[$ijpos] = $t;
}
}
$t = (double) hypot($f, $g);
$cs = $f / $t;
/* Division */
$sn = $g / $t;
/* Division */
$s[$j] = $t;
$f = $cs * $e[$j] + $sn * $s[$j + 1];
$s[$j + 1] = -$sn * $e[$j] + $cs * $s[$j + 1];
$g = $sn * $e[$j + 1];
$e[$j + 1] = $cs * $e[$j + 1];
if ($wantu && $j < $m - 1) {
for ($i = 0; $i < $m; $i++) {
$t = $cs * $u[$ijpos = $i * $un + $j] + $sn * $u[$ij1pos = $i * $un + $j + 1];
$u[$ij1pos] = -$sn * $u[$ijpos] + $cs * $u[$ij1pos];
$u[$ijpos] = $t;
}
}
}
$e[$p - 2] = $f;
$iter = $iter + 1;
break;
/* Convergence. */
/* Convergence. */
case 4:
/* Make the singular values positive. */
if (compare($s[$k], 0) <= 0) {
$s[$k] = $s[$k] < 0 ? -$s[$k] : 0.0;
if ($wantv) {
for ($i = 0; $i <= $pp; $i++) {
$v[$pos = $i * $vn + $k] = -$v[$pos];
}
}
}
/* Order the singular values. */
while ($k < $pp) {
if (compare($s[$k], $s[$k + 1]) >= 0) {
break;
}
$t = $s[$k];
$s[$k] = $s[$k + 1];
$s[$k + 1] = $t;
if ($wantv && $k < $n - 1) {
for ($i = 0; $i < $n; $i++) {
$t = $v[$ik1pos = $i * $vn + $k + 1];
$v[$ik1pos] = $v[$ikpos = $i * $vn + $k];
$v[$ikpos] = $t;
}
}
if ($wantu && $k < $m - 1) {
for ($i = 0; $i < $m; $i++) {
$t = $u[$ik1pos = $i * $un + $k + 1];
$u[$ik1pos] = $u[$ikpos = $i * $un + $k];
$u[$ikpos] = $t;
}
}
$k++;
}
$iter = 0;
$p--;
break;
}
}
if ($sl > $m) {
$this->l_singular->u_stride = $m;
$s->setSize($m);
}
}
function calculate_distance($SimilarityCoefficient, $Rootx, $Rooty){
$MaxWidth = WIDTH - $Rootx;
$MaxHeight = HEIGHT - $Rooty;
$x = $MaxWidth - ($SimilarityCoefficient*$MaxWidth*.01); // Possible x value
$y = $MaxHeight - ($SimilarityCoefficient*$MaxHeight); // Possible y value
$Hypot = hypot($Rootx - $x, $Rooty - $y);
return $MaxWidth - $Hypot;
}
* Description: Calculate the length of the hypotenuse of a right-angle triangle
* Source code: ext/standard/math.c
*/
echo "*** Testing hypot() : usage variations ***\n";
//get an unset variable
$unset_var = 10;
unset($unset_var);
// heredoc string
$heredoc = <<<EOT
abc
xyz
EOT;
// get a class
class classA
{
}
// get a resource variable
$fp = fopen(__FILE__, "r");
// unexpected values to be passed to $arg argument
$inputs = array(0, 1, 12345, -2345, 2147483647, 10.5, -10.5, 123456789000.0, 1.23456789E-9, 0.5, NULL, null, true, false, TRUE, FALSE, "", '', array(), "abcxyz", 'abcxyz', $heredoc, new classA(), @$undefined_var, @$unset_var, $fp);
// loop through each element of $inputs to check the behaviour of hypot()
$iterator = 1;
foreach ($inputs as $input) {
echo "\n-- Iteration {$iterator} --\n";
var_dump(hypot($input, 5));
$iterator++;
}
fclose($fp);
?>
===Done===
/**
* @param Node $node1
* @param Node $node2
* @return float
*/
public static function getLinearDistance(Node $node1, Node $node2)
{
$dist_x = abs($node1->getX() - $node2->getX());
$dist_y = abs($node1->getY() - $node2->getY());
return hypot($dist_x, $dist_y);
}
<?php
/* Prototype : float hypot ( float $x , float $y )
* Description: Calculate the length of the hypotenuse of a right-angle triangle.
* Source code: ext/standard/math.c
*/
echo "*** Testing hypot() : basic functionality ***\n";
$valuesy = array(23, -23, 23.45, -23.45, 0x17, 027, "23", "23.45", "2.345e1", "23abc", null, true, false);
$valuesx = array(33, -33, 33.45, -33.45, 0x27, 037, "33", "43.45", "1.345e1", "33abc", null, true, false);
for ($i = 0; $i < count($valuesy); $i++) {
for ($j = 0; $j < count($valuesx); $j++) {
echo "\nY:{$valuesy[$i]} X:{$valuesx[$j]} ";
$res = hypot($valuesy[$i], $valuesx[$j]);
var_dump($res);
}
}
?>
===Done===
public function frobeniusNorm()
{
$result = 0.0;
for ($i = 0; $i < $this->u_size; $i++) {
$offset = $i * $this->u_stride;
for ($j = 0; $j < $this->u_stride; $j++) {
$result = hypot($result, $this->u_data[$offset + $j]);
}
}
return $result;
}
/**
* Calculate the length of the hypotenuse of a right-angle triangle.
* @link http://php.net/manual/en/function.hypot.php
* @param float $x <p>Length of first side</p>
* @param float $y <p>Length of second side</p>
* @return float Calculated length of the hypotenuse
*/
public static function hypot($x, $y)
{
return hypot($x, $y);
}
/**
* Calculate hypotenuse
*
* @param number $xValue Length of first line
* @param number $yValue Length of second line
*
* @return float
*/
public static function hypotenuse($xValue, $yValue)
{
return hypot($xValue, $yValue);
}
echo "floor\n";
echo floor(-2354) . " " . floor("foo") . " " . floor(0) . " " . floor(5) . floor(1.2345) . "\n";
// in windows, php has this at 32767 for no good reason
if (PHP_OS != 'WINNT') {
echo getrandmax() . "\n";
if (100000 < getrandmax()) {
echo "getrandmax: Well, that's a start.\n";
} else {
echo "woops, getrandmax: " . getrandmax() . "\n";
}
}
echo "hexdec\n";
echo hexdec("-2354") . " " . hexdec("foo") . " " . hexdec(0) . " " . hexdec(5) . hexdec("1.2345") . "\n";
if (PHP_OS != 'WINNT') {
echo "hypot\n";
echo hypot(-2354, 34) . " " . hypot("foo", 2) . " " . hypot(0, 0) . " " . hypot(5, 12) . hypot(1.2345, 2.3234) . "\n";
}
echo "log\n";
echo log(-2354) . " " . log("foo") . " " . log(0) . " " . log(5) . log(1.2345) . "\n";
echo "log10\n";
echo log10(-2354) . " " . log10("foo") . " " . log10(0) . " " . log10(5) . log10(1.2345) . "\n";
if (PHP_OS != 'WINNT') {
echo "log1p\n";
echo log1p(-2354) . " " . log1p("foo") . " " . log1p(0) . " " . log1p(5) . log1p(1.2345) . "\n";
}
echo "octdec\n";
echo octdec("-2354") . " " . octdec("foo") . " " . octdec(0) . " " . octdec(5) . octdec("1.2345") . "\n";
echo "pi\n";
echo pi() . "\n";
echo "pow\n";
echo pow(-2354, 4) . " " . pow("foo", 2) . " " . pow(0, 0) . " " . pow(5, 12) . pow(1.2345, 2.3234) . "\n";
<?php $num = 25; $raizQuadrada = sqrt($num); // 5 $potencia = 2; $potencia = pow($num, $potencia); // 625 $graus = 45; // inclinação... $radianos = deg2rad($graus); // 0.785398163397 $grausNovamente = rad2deg($radianos); $seno = sin($radianos); $cosseno = cos($radianos); $tangente = tan($radianos); echo pi(); // 3.1415926535898 echo M_PI; // 3.1415926535898 echo M_SQRTPI; // raiz de pi, 1.77245385090551602729 $hipotenusa = hypot(3, 4); // 5, = sqrt(3*3+4*4); $numDecimal = 256; $numBinario = base_convert($numDecimal, 10, 2); $numHexa = base_convert($numDecimal, 10, 16); echo log(5); // logaritmo natural
