How do i convert this into PHP?

Question

1.00/5 (2 votes)

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C#

static void Main()
{
    double [][] pointset = new double[][]{
        new double[] {10,0.45},
        new double[] {3.091,12.9},
        new double[] {8.12,13.01},
        new double[] {6.23,8.731},
        new double[] {12.12,2.568},
        new double[] {9.51,5.89},
        new double[] {7.67,11.901}
    };
    double[] y = { 0, 0 };
    for (int i = 0; i < 20; i++) {
        y = algorithm(pointset, y);
        Console.WriteLine("({0:0.000},{1:0.000})",y[0],y[1]);
    }
    Console.ReadKey();
    }

static double[] algorithm(double[][] pointset, double[] y)
{
    double[] s1 = {0,0};
    double s2 = 0;
    foreach (double[] point in pointset) {
        double norm = Eucnorm(new double[] { point[0] - y[0], point[1] - y[1] });
        s1[0] += point[0] / norm;
        s1[1] += point[1] / norm;
        s2 += 1 / norm;
    }
    return new double[] {s1[0]/s2, s1[1]/s2};
}

static double Eucnorm(double[] v)
{
    return Math.Sqrt((v[0] * v[0] + v[1] * v[1]));
}

Posted 3-Dec-13 20:29pm

Member 10443587

Updated 3-Dec-13 22:55pm

Richard MacCutchan

v2

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Comments

Richard MacCutchan 4-Dec-13 4:55am

I would start by learning PHP.

CPallini 4-Dec-13 5:00am

You should try hard, however, since the OP cannot wait too long.

Richard MacCutchan 4-Dec-13 5:21am

Well, I can spell it.

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Killzone DeathMan · Accepted Answer · 2014-01-02T00:44:00

PHP

$pointset = array(
    array(10, 0.45),
    array(10, 0.45),
    array(3.091,12.9),
    array(8.12,13.01),
    array(6.23,8.731),
    array(12.12,2.568),
    array(9.51,5.89),
    array(7.67,11.901)
);

$y = array(0,0);

for($i = 0; $i < 20; $i++){
  $y = algorithm($pointset, $y);
  echo $y[0] . ',' . $y[1] . '<br />';
}

function algorithm($pointset, $y){
    $s1 = array(0,0);
    $s2 = 0;
    foreach ($pointset as $point) {
        $norm = Eucnorm(array($point[0] - $y[0], $point[1] - $y[1] ));
        $s1[0] += $point[0] / $norm;
        $s1[1] += $point[1] / $norm;
        $s2 += 1 / $norm;
    }
    return array($s1[0]/ $s2, $s1[1] / $s2);
}
 
function Eucnorm($v){
    return sqrt(($v[0] * $v[0] + $v[1] * $v[1]));
}

And the output is:

8.4694229958382,6.3750562923086
8.7391111370073,6.5636031962359
8.7786455894498,6.5618090919414
8.7943588659231,6.5449477143646
8.8070652809877,6.5284004270569
8.8185637197715,6.5132713529887
8.8290814816784,6.4995149942758
8.8387123815852,6.4870066624231
8.8475329199354,6.4756275801103
8.8556122056453,6.4652704538268
8.8630132953696,6.4558387585837
8.8697937889668,6.4472456393321
8.8760063177511,6.4394128933972
8.8816989826087,6.4322700597592
8.8869157513509,6.4257536067247
8.8916968199918,6.4198062077897
8.8960789416409,6.4143760962772
8.9000957261516,6.4094164902423
8.9037779132619,6.4048850799758
8.9071536216511,6.4007435712189