Difference between revisions of "Riemann sum II"

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Line 1: Line 1:
 
<jsxgraph width="800" height="400" box="box">
 
<jsxgraph width="800" height="400" box="box">
var brd = JXG.JSXGraph.initBoard('box', {originX: 400, originY: 200, unitX: 50, unitY: 50});
+
var brd = JXG.JSXGraph.initBoard('box', {boundingbox: [-8, 4, 8, -4], axis: true});
brd.create('axis', [[0,0], [1,0]], {strokeColor:'black'});
 
brd.create('axis', [[0,0], [0,1]], {strokeColor:'black'});        
 
 
var b = brd.create('slider',[[1,3.5],[5,3.5],[0,1,3]],{name:'a', strokeColor:'black', fillColor:'white'});
 
var b = brd.create('slider',[[1,3.5],[5,3.5],[0,1,3]],{name:'a', strokeColor:'black', fillColor:'white'});
 
var f = function(x){ return b.Value()*Math.sin(x); }
 
var f = function(x){ return b.Value()*Math.sin(x); }
Line 14: Line 12:
  
 
===The underlying JavaScript code===
 
===The underlying JavaScript code===
<source lang="xml">
+
<source lang="javascript">
<jsxgraph width="800" height="400" box="box">
+
var brd = JXG.JSXGraph.initBoard('box', {boundingbox: [-8, 4, 8, -4]});
var brd = JXG.JSXGraph.initBoard('box', {originX: 400, originY: 200, unitX: 50, unitY: 50});
 
brd.create('axis', [[0,0], [1,0]], {strokeColor:'black'});
 
brd.create('axis', [[0,0], [0,1]], {strokeColor:'black'});        
 
 
var b = brd.create('slider',[[1,3.5],[5,3.5],[0,1,3]],{name:'a', strokeColor:'black', fillColor:'white'});
 
var b = brd.create('slider',[[1,3.5],[5,3.5],[0,1,3]],{name:'a', strokeColor:'black', fillColor:'white'});
 
var f = function(x){ return b.Value()*Math.sin(x); }
 
var f = function(x){ return b.Value()*Math.sin(x); }
Line 27: Line 22:
 
var t1 = brd.create('text',[-7,2,"(a*sin(x))'"],{strokeColor:'#9370DB'});
 
var t1 = brd.create('text',[-7,2,"(a*sin(x))'"],{strokeColor:'#9370DB'});
 
var t2 = brd.create('text',[-7,-1.5,"a*sin(x)"],{strokeColor:'#32CD32'});  
 
var t2 = brd.create('text',[-7,-1.5,"a*sin(x)"],{strokeColor:'#32CD32'});  
</jsxgraph>
 
 
</source>
 
</source>
  
 
[[Category:Examples]]
 
[[Category:Examples]]
 
[[Category:Calculus]]
 
[[Category:Calculus]]

Revision as of 14:32, 8 June 2011

The underlying JavaScript code

var brd = JXG.JSXGraph.initBoard('box', {boundingbox: [-8, 4, 8, -4]});
var b = brd.create('slider',[[1,3.5],[5,3.5],[0,1,3]],{name:'a', strokeColor:'black', fillColor:'white'});
var f = function(x){ return b.Value()*Math.sin(x); }
var plot = brd.create('functiongraph',[f,-7,7], {strokeColor:'#32CD32', strokeWidth:'4px'});
var g = brd.D(f);
var plot2 = brd.create('functiongraph',[g,-7,7], {strokeColor:'#9370DB', strokeWidth:'2px'});
var os = brd.create('riemannsum',[f, 35, 'middle', -7, 7], {fillColor:'#B22222', fillOpacity:0.3, strokeColor:'#8B1A1A', strokeWidth:'2px'});
var t1 = brd.create('text',[-7,2,"(a*sin(x))'"],{strokeColor:'#9370DB'});
var t2 = brd.create('text',[-7,-1.5,"a*sin(x)"],{strokeColor:'#32CD32'});