Difference between revisions of "Interpolation: Neville's algorithm"

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Line 1: Line 1:
 
<html>
 
<html>
<link rel="stylesheet" type="text/css" href="http://jsxgraph.uni-bayreuth.de/distrib/jsxgraph.css" />
 
<script type="text/javascript" src="http://jsxgraph.uni-bayreuth.de/distrib/jsxgraphcore.js"></script>
 
 
<form><input type="button" value="Add point" onClick="addPoint()"></form>
 
<form><input type="button" value="Add point" onClick="addPoint()"></form>
<div id="box" class="jxgbox" style="width:600px; height:400px;"></div>
+
</html>
<script language="JavaScript">
+
<jsxgraph box="box" width="600" height="400">
     board = JXG.JSXGraph.initBoard('box', {axis:true, originX: 250, originY: 250, unitX: 50, unitY: 50});
+
     board = JXG.JSXGraph.initBoard('box', {axis:true, boundingbox: [-5, 5, 7, -3]});
 
     board.suspendUpdate();
 
     board.suspendUpdate();
 
     var p = [];
 
     var p = [];
     p[0] = board.create('point', [-1,2], {style:6});
+
     p[0] = board.create('point', [-1,2], {size:4});
     p[1] = board.create('point', [3,-1], {style:6});
+
     p[1] = board.create('point', [3,-1], {size:4});
     p[2] = board.create('point', [2,1], {style:6});
+
     p[2] = board.create('point', [2,1], {size:4});
 
     graph = board.create('curve', board.neville(p),{strokeWidth:5,strokeOpacity:0.5});
 
     graph = board.create('curve', board.neville(p),{strokeWidth:5,strokeOpacity:0.5});
 
     g = board.create('glider', [graph], {name:'Glider'});
 
     g = board.create('glider', [graph], {name:'Glider'});
Line 17: Line 15:
 
        
 
        
 
     function addPoint() {
 
     function addPoint() {
       p.push(board.create('point',[(Math.random()-0.5)*10,(Math.random()-0.5)*3],{style:6}));
+
       p.push(board.create('point',[(Math.random()-0.5)*10,(Math.random()-0.5)*3],{size:4}));
 
       board.update();
 
       board.update();
 
     }
 
     }
 
            
 
            
</script>
+
</jsxgraph>
</html>
+
 
 
=== References ===
 
=== References ===
 
* [http://en.wikipedia.org/wiki/Neville%27s_algorithm http://en.wikipedia.org/wiki/Neville's_algorithm]
 
* [http://en.wikipedia.org/wiki/Neville%27s_algorithm http://en.wikipedia.org/wiki/Neville's_algorithm]
  
 
=== The underlying JavaScript code ===
 
=== The underlying JavaScript code ===
<source lang="html4strict">
 
<link rel="stylesheet" type="text/css" href="http://jsxgraph.uni-bayreuth.de/distrib/jsxgraph.css" />
 
<script type="text/javascript" src="http://jsxgraph.uni-bayreuth.de/distrib/jsxgraphcore.js"></script>
 
<div id="box" class="jxgbox" style="width:600px; height:400px;"></div>
 
</source>
 
  
 
<source lang="javascript">
 
<source lang="javascript">
    board = JXG.JSXGraph.initBoard('box', {axis:true, originX: 250, originY: 250, unitX: 50, unitY: 50});
+
board = JXG.JSXGraph.initBoard('box', {axis:true, boundingbox: [-5, 5, 7, -3]});
    board.suspendUpdate();
+
board.suspendUpdate();
    var p = [];
+
var p = [];
    p[0] = board.create('point', [-1,2], {style:6});
+
p[0] = board.create('point', [-1,2], {size:4});
    p[1] = board.create('point', [3,-1], {style:6});
+
p[1] = board.create('point', [3,-1], {size:4});
    p[2] = board.create('point', [2,1], {style:6});
+
p[2] = board.create('point', [2,1], {size:4});
    graph = board.create('curve', board.neville(p),{strokeWidth:5,strokeOpacity:0.5});
+
var graph = board.create('curve', board.neville(p),{strokeWidth:5,strokeOpacity:0.5});
    g = board.create('glider', [graph]);
+
g = board.create('glider', [graph]);
    t = board.create('tangent', [g],{dash:1,strokeColor:'green'});
+
t = board.create('tangent', [g],{dash:1,strokeColor:'green'});
    board.unsuspendUpdate();
+
board.unsuspendUpdate();
 
        
 
        
    function addPoint() {
+
function addPoint() {
      p.push(board.create('point',[(Math.random()-0.5)*10,(Math.random()-0.5)*3],{style:6}));
+
    p.push(board.create('point',[(Math.random()-0.5)*10,(Math.random()-0.5)*3],{size:4}));
      board.update();
+
    board.update();
    }
+
}
 
</source>
 
</source>
  

Revision as of 09:52, 8 June 2011

References

The underlying JavaScript code

board = JXG.JSXGraph.initBoard('box', {axis:true, boundingbox: [-5, 5, 7, -3]});
board.suspendUpdate();
var p = [];
p[0] = board.create('point', [-1,2], {size:4});
p[1] = board.create('point', [3,-1], {size:4});
p[2] = board.create('point', [2,1], {size:4});
var graph = board.create('curve', board.neville(p),{strokeWidth:5,strokeOpacity:0.5});
g = board.create('glider', [graph]);
t = board.create('tangent', [g],{dash:1,strokeColor:'green'});
board.unsuspendUpdate();
      
function addPoint() {
    p.push(board.create('point',[(Math.random()-0.5)*10,(Math.random()-0.5)*3],{size:4}));
    board.update();
}