Rational functions: Difference between revisions

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<source lang="javascript">
<source lang="javascript">
        board = JXG.JSXGraph.initBoard('box1', {originX: 300, originY: 100, unitX: 30, unitY: 25});
board = JXG.JSXGraph.initBoard('box1', {originX: 300, originY: 100, unitX: 30, unitY: 25, axis:true});
        // Axes
var p = [];
        b1axisx = board.createElement('axis', [[0,0], [1,0]], {});
var q = [];
        b1axisy = board.createElement('axis', [[0,0], [0,1]], {});
p[0] = board.createElement('point', [-1,2], {style:6});
p[1] = board.createElement('point', [3,-1], {style:6});
var f = board.lagrangePolynomial(p);
graph = board.createElement('functiongraph', [f,-10, 10]);


        var p = [];
function addPoint1() {
        var q = [];
  p.push(board.createElement('point',[(Math.random()-0.5)*10,(Math.random()-0.5)*3],{style:6}));
        p[0] = board.createElement('point', [-1,2], {style:6});
  board.update();
        p[1] = board.createElement('point', [3,-1], {style:6});
}
        var f = board.lagrangePolynomial(p);
        graph = board.createElement('functiongraph', [f,-10, 10]);


        function addPoint1() {
board2 = JXG.JSXGraph.initBoard('box2', {originX: 300, originY: 100, unitX: 30, unitY: 25, axis:true});
          p.push(board.createElement('point',[(Math.random()-0.5)*10,(Math.random()-0.5)*3],{style:6}));
q[0] = board2.createElement('point', [-1,2], {style:6});
          board.update();
q[1] = board2.createElement('point', [3,-1], {style:6});
        }
var f2 = board2.lagrangePolynomial(q);
graph2 = board2.createElement('functiongraph', [f2, -10, 10]);


        board2 = JXG.JSXGraph.initBoard('box2', {originX: 300, originY: 100, unitX: 30, unitY: 25});
function addPoint2() {
        // Axes
  q.push(board2.createElement('point',[(Math.random()-0.5)*10,(Math.random()-0.5)*3],{style:6}));
        b1axisx2 = board2.createElement('axis', [[0,0], [1,0]], {});
  board2.update();
        b1axisy2 = board2.createElement('axis', [[0,0], [0,1]], {});
}


        q[0] = board2.createElement('point', [-1,2], {style:6});
board3 = JXG.JSXGraph.initBoard('box3', {originX: 300, originY: 200, unitX: 30, unitY: 25, axis:true});
        q[1] = board2.createElement('point', [3,-1], {style:6});
graph3 = board3.createElement('functiongraph', [function(x){return f(x)/f2(x);}, -10, 10], {strokeColor:'#ff0000'});
        var f2 = board2.lagrangePolynomial(q);
        graph2 = board2.createElement('functiongraph', [f2, -10, 10]);


        function addPoint2() {
          q.push(board2.createElement('point',[(Math.random()-0.5)*10,(Math.random()-0.5)*3],{style:6}));
          board2.update();
        }
        board3 = JXG.JSXGraph.initBoard('box3', {originX: 300, originY: 200, unitX: 30, unitY: 25});
        // Axes
        b1axisx3 = board3.createElement('axis', [[0,0], [1,0]], {});
        b1axisy3 = board3.createElement('axis', [[0,0], [0,1]], {});
        graph3 = board3.createElement('functiongraph', [function(x){return f(x)/f2(x);}, -10, 10], {strokeColor:'#ff0000'});
board.addChild(board3);
board.addChild(board3);
board2.addChild(board3);
board2.addChild(board3);

Revision as of 13:37, 21 August 2009

Polynomial [math]\displaystyle{ f }[/math]:

Polynomial [math]\displaystyle{ g }[/math]:

Rational function [math]\displaystyle{ \frac{f}{g} }[/math]:

References

The underlying JavaScript source code

board = JXG.JSXGraph.initBoard('box1', {originX: 300, originY: 100, unitX: 30, unitY: 25, axis:true});
var p = [];
var q = [];
p[0] = board.createElement('point', [-1,2], {style:6});
p[1] = board.createElement('point', [3,-1], {style:6});
var f = board.lagrangePolynomial(p);
graph = board.createElement('functiongraph', [f,-10, 10]);

function addPoint1() {
   p.push(board.createElement('point',[(Math.random()-0.5)*10,(Math.random()-0.5)*3],{style:6}));
   board.update();
}

board2 = JXG.JSXGraph.initBoard('box2', {originX: 300, originY: 100, unitX: 30, unitY: 25, axis:true});
q[0] = board2.createElement('point', [-1,2], {style:6});
q[1] = board2.createElement('point', [3,-1], {style:6});
var f2 = board2.lagrangePolynomial(q);
graph2 = board2.createElement('functiongraph', [f2, -10, 10]);

function addPoint2() {
   q.push(board2.createElement('point',[(Math.random()-0.5)*10,(Math.random()-0.5)*3],{style:6}));
   board2.update();
}

board3 = JXG.JSXGraph.initBoard('box3', {originX: 300, originY: 200, unitX: 30, unitY: 25, axis:true});
graph3 = board3.createElement('functiongraph', [function(x){return f(x)/f2(x);}, -10, 10], {strokeColor:'#ff0000'});

board.addChild(board3);
board2.addChild(board3);