stdNormDist100pt.js

/*stdNormDist100pt.js
* copyright (c) 2016 Yuji SODE <yuji.sode@gmail.com>
*/
//it draws 100 points: [-4,+4] graph data of the standard normal distribution.
//data was calculated with gnuplot version 4.6 patchlevel 4.
function _stdNormDist100pt(){
  var slf=this.window,cvsId,c,d,n=0,i=1,w0=0,h0=0,dw=0,dh=0;
  cvsId=slf.prompt('canvas id?');
  c=slf.document.getElementById(cvsId).getContext('2d');
  if(!c){throw 'the id/canvas tag is undefined';}
  w0=c.canvas.width,h0=c.canvas.height;
  dw=w0*0.01,dh=h0/0.3989422804014327;
  d=xy(),n=d.length;
  c.clearRect(0,0,w0,h0);
  c.strokeStyle='rgba(0,0,255,1)',c.lineWidth=1.0;
  //drawing graph
  c.beginPath(),c.moveTo(0,h0-d[0][1]*dh);
  while(i<n){c.lineTo(i*dw,h0-d[i][1]*dh),i+=1;}
  c.stroke();
//====== data calculated with GNUPLOT Version 4.6 patchlevel 4 ======
//it returns 100 points: [-4,+4] graph data of the standard normal distribution.
    function xy(){
      return [
      [-4,0.00013383],[-3.91919,0.000184295],[-3.83838,0.000252138],[-3.75758,0.00034271],[-3.67677,0.000462785],[-3.59596,0.000620862],
      [-3.51515,0.000827515],[-3.43434,0.00109577],[-3.35354,0.00144155],[-3.27273,0.00188409],[-3.19192,0.00244646],[-3.11111,0.00315602],
      [-3.0303,0.00404487],[-2.94949,0.00515031],[-2.86869,0.00651518],[-2.78788,0.00818811],[-2.70707,0.0102236],[-2.62626,0.0126821],
      [-2.54545,0.0156293],[-2.46465,0.0191361],[-2.38384,0.0232772],[-2.30303,0.0281302],[-2.22222,0.0337737],[-2.14141,0.0402854],
      [-2.06061,0.0477399],[-1.9798,0.0562056],[-1.89899,0.0657418],[-1.81818,0.0763955],[-1.73737,0.0881979],[-1.65657,0.101161],
      [-1.57576,0.115274],[-1.49495,0.130501],[-1.41414,0.146778],[-1.33333,0.16401],[-1.25253,0.182073],[-1.17172,0.200809],
      [-1.09091,0.220033],[-1.0101,0.239527],[-0.929293,0.259051],[-0.848485,0.278343],[-0.767677,0.297125],[-0.686869,0.31511],
      [-0.606061,0.332009],[-0.525253,0.347537],[-0.444444,0.361424],[-0.363636,0.373419],[-0.282828,0.383301],[-0.20202,0.390884],
      [-0.121212,0.396022],[-0.040404,0.398617],[0.040404,0.398617],[0.121212,0.396022],[0.20202,0.390884],[0.282828,0.383301],
      [0.363636,0.373419],[0.444444,0.361424],[0.525253,0.347537],[0.606061,0.332009],[0.686869,0.31511],[0.767677,0.297125],
      [0.848485,0.278343],[0.929293,0.259051],[1.0101,0.239527],[1.09091,0.220033],[1.17172,0.200809],[1.25253,0.182073],
      [1.33333,0.16401],[1.41414,0.146778],[1.49495,0.130501],[1.57576,0.115274],[1.65657,0.101161],[1.73737,0.0881979],
      [1.81818,0.0763955],[1.89899,0.0657418],[1.9798,0.0562056],[2.06061,0.0477399],[2.14141,0.0402854],[2.22222,0.0337737],
      [2.30303,0.0281302],[2.38384,0.0232772],[2.46465,0.0191361],[2.54545,0.0156293],[2.62626,0.0126821],[2.70707,0.0102236],
      [2.78788,0.00818811],[2.86869,0.00651518],[2.94949,0.00515031],[3.0303,0.00404487],[3.11111,0.00315602],[3.19192,0.00244646],
      [3.27273,0.00188409],[3.35354,0.00144155],[3.43434,0.00109577],[3.51515,0.000827515],[3.59596,0.000620862],[3.67677,0.000462785],
      [3.75758,0.00034271],[3.83838,0.000252138],[3.91919,0.000184295],[4,0.00013383]
      ];}
}