Random walks: Difference between revisions
From JSXGraph Wiki
A WASSERMANN (talk | contribs) No edit summary |
A WASSERMANN (talk | contribs) No edit summary |
||
| Line 18: | Line 18: | ||
<option value="100">100</option> | <option value="100">100</option> | ||
<option value="200">200</option> | <option value="200">200</option> | ||
</select> where < | </select> where <i>stepsize=5</i> and <i>Number of steps per walk = 100</i><br /> | ||
<input type="button" value="run" onClick="run()"> | <input type="button" value="run" onClick="run()"> | ||
<input type="button" value="clear" onClick="clearturtle()"> | <input type="button" value="clear" onClick="clearturtle()"> | ||
| Line 76: | Line 76: | ||
for (i=0;i<nr;i++) { | for (i=0;i<nr;i++) { | ||
t.setPenColor(HSV2RGB(Math.round(Math.random()*255),Math.random(),Math.random())); | t.setPenColor(HSV2RGB(Math.round(Math.random()*255),Math.random(),Math.random())); | ||
for (j=0;j< | for (j=0;j<100;j++) { | ||
var a = Math.floor(360*Math.random()); | var a = Math.floor(360*Math.random()); | ||
t.right(a); | t.right(a); | ||
Revision as of 07:31, 27 May 2009
Source code
<jsxgraph width="600" height="600">
var brd = JXG.JSXGraph.initBoard('jxgbox', {originX: 300, originY: 300, unitX: 3, unitY: 3});
var t = brd.createElement('turtle');
function run() {
var i,j,dist,sumdist=0.0;
var stepSize = 5;
brd.suspendUpdate();
var nr = $('number').value*1;
for (i=0;i<nr;i++) {
for (j=0;j<100;j++) {
var a = Math.floor(360*Math.random());
t.right(a);
t.forward(stepSize);
}
dist = t.pos[0]*t.pos[0]+t.pos[1]*t.pos[1];
sumdist += dist;
t.home();
}
$('output').value = (sumdist/nr).toFixed(3);
brd.unsuspendUpdate();
}
function clearturtle() {
sumist = 0.0
t.cs();
}
</jsxgraph>
