Tutoriel Javascript 7: Intégrale de Riemann

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X Min = X Max = Y Min = Y Max =


f(x)=


f(x)= Exemples sin(2 x) - 1 / 10 x^2 + 3 2 + cos(x/2) x^2 / 20 ln(x) sqrt(x) cbrx


Paramètres de la somme: a = b = Nombre de rectangles n =




Source : http://webspace.ship.edu/msrenault/tutorial/Tutorial%207%20-%20Incorporating%20JavaScript.html

Code:

<form name="MyForm">
 Min X = <input name="LowXField" size="5" value="-1" type="text">
 Max X = <input name="HighXField" size="5" value="9" type="text">
 Min Y = <input name="LowYField" size="5" value="-2" type="text">
 Max Y = <input name="HighYField" size="5" value="5" type="text">
 <input value="Afficher la fenêtre" onclick="setView()" type="button">

<p>
 
 f(x) = <input name="FunctionField" size="30" value=" "> 
 <input value="Graphique" onclick="setFunction()" type="button">  
 <p>
 
 f(x) = <select name="ExampleSelect"> 
  <option value="">Exemples</option>
  <option value="sin(2 x) - 1 / 10 x^2 + 3">sin(2 x) - 1 / 10 x^2 + 3</option>
  <option value="2 + cos(x/2)">2 + cos(x/2)</option>

<option value="x^2 / 20">x^2 / 20</option>
  <option value="ln(x)">ln(x)</option>
  <option value="sqrt(x)">sqrt(x)</option>
  <option value="cbrt(x)">cbrt(x)</option>
  </select>
 <input value="Charger l'exemple" onclick="exampleLoader()" type="button"> 
 <p>

Paramètres de la somme: a = <input name="A" size="5" value="1" type="text">
     b = <input name="B" size="5" value="7" type="text">
    Nombre de rectangles n = <input name="N" size="5" value="12" type="text">
 <input value="Valider" onclick="setRiemann()" type="button">

</form>


<script type="text/javascript">
 function setView() {
  var applet = document.ggbApplet;
  var LowX = document.MyForm.LowXField.value;
  var HighX = document.MyForm.HighXField.value;
  var LowY = document.MyForm.LowYField.value;
  var HighY = document.MyForm.HighYField.value;

  applet.setCoordSystem(LowX, HighX, LowY, HighY);
 }

 function setFunction() {
  var applet = document.ggbApplet;
  var func = "f(x) = " + document.MyForm.FunctionField.value;
  applet.evalCommand(func);
 }

 function exampleLoader() {
  var func = document.MyForm.ExampleSelect.value;
  if (func != "") {
   document.MyForm.FunctionField.value = func;
   setFunction();
  }
 }
 
 function setRiemann() {
  var applet = document.ggbApplet;
  var a = document.MyForm.A.value
  var b = document.MyForm.B.value
  var n = document.MyForm.N.value
  
  applet.evalCommand("a = " + a);
  applet.evalCommand("b = " + b);
  applet.evalCommand("n = " + n);
 }
 
</script>