20 lines
742 B
JavaScript
20 lines
742 B
JavaScript
const b = JXG.JSXGraph.initBoard('jsxgraph', {
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boundingbox: [-6, 1.2, 6,-1.2], axis:true
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});
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var f = function(x) {return Math.sin(x) / x;};
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var graph = b.create("functiongraph", [f, -6, 6])
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var seg = b.create("line", [[-6,0], [6,0]], {fixed:true});
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var X = b.create("glider", [2, 0, seg], {name:"x", size:4});
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var P = b.create("point", [function() {return X.X()}, function() {return f(X.X())}], {name:""});
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var Q = b.create("point", [0, function() {return P.Y();}], {name:"f(x)"});
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var segup = b.create("segment", [P,X], {dash:2});
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var segover = b.create("segment", [P, [0, function() {return P.Y()}]], {dash:2});
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txt = b.create('text', [2, 1, function() {
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return "x = " + X.X().toFixed(4) + ", f(x) = " + P.Y().toFixed(4);
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}]);
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