Power series - pointwise: Difference between revisions

Revision as of 08:08, 7 January 2019

nth-coefficient: <input type="text" id="input" value="1 / factorial(n)"> <input type="button" value="clear all" onClick="clearAll()">

@@ Line 1: / Line 1: @@
+nth-coefficient: <input type="text" id="input" value="1 / factorial(n)">
+<input type="button" value="clear all" onClick="clearAll()">
 <jsxgraph width="600" height="600">
 var board = JXG.JSXGraph.initBoard('jxgbox', {boundingbox:[-8,8,8,-8], axis:true});
-var f, curve; // global objects
-var p = board.create('glider', [1, 0, board.defaultAxes.x]);
+var p = board.create('glider', [0, 0, board.defaultAxes.x] , {name: 'x'});
+var q = board.create('point', [0, 0], {name: '', color: 'blue', trace: true});
+p.on('up', function(evt) {
+  var x, n, m = 50;
+  var txtraw = document.getElementById('input').value;
+  var a_n = board.jc.snippet(txtraw, true, 'n', true);
+  var s = 0;
+  x = p.X();
+  for (n = 0; n < m; n++) {
+    s += a_n(n) * Math.pow(x, n);
+  }
+  q.moveTo([x, s], 0);
+});
 </jsxgraph>