Difference between revisions of "Even simpler function plotter"

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Line 2: Line 2:
 
<input type="text" id="input" value="sin(x)*x">
 
<input type="text" id="input" value="sin(x)*x">
 
<input type="button" value="plot" onClick="plotter()">
 
<input type="button" value="plot" onClick="plotter()">
<input type="button" value="clear all" onClick="board=clearAll(board)">  
+
<input type="button" value="clear all" onClick="clearAll()">  
 
</form>
 
</form>
 
</html>
 
</html>

Revision as of 17:47, 22 March 2010

The underlying JavaScript code

var board = JXG.JSXGraph.initBoard('jxgbox', {boundingbox:[-5,8,8,-5], axis:true});

function plotter() {
  var t = board.algebra.geonext2JS(document.getElementById('input').value);
  var f = new Function('x','var y = '+t+'; return y;');
  board.create('functiongraph',[f]);
}
function clearAll(board) {
    JXG.JSXGraph.freeBoard(board);
    board = JXG.JSXGraph.initBoard('jxgbox', {boundingbox:[-5,8,8,-5], axis:true});
}