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Nov 20th, 2008

calculate mean function!

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Hello,

I am supposed to write a program that prompts user to enter the numbers separated by space and when user click "ok" button, it should display the numbers entered with its mean, and standard deviation and the window should ask if user wants to enter numbers again if yes then it should display the new numbers entered, with its mean and standard deviation.

I created an external javascript file and embedded inside the strict XHTML file
here is what I got :-

JavaScript / DHTML / AJAX Syntax (Toggle Plain Text)
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title> Calculator</title>
<script type="text/javascript" src="mean.js"></script>
</head>
 
<body>
<p>This page calculates mean and standard deviation</p>
</body>
<script type="text/javascript">
var n=new Array();
</script>
</html>
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title> Calculator</title>
<script type="text/javascript" src="mean.js"></script>
</head>

<body>
<p>This page calculates mean and standard deviation</p>
</body>
<script type="text/javascript">
var n=new Array();
</script>
</html>

I decide to write MeanCalculation function and standardDevationCalculation function and NUmberReader function

My NumberReader function is

JavaScript / DHTML / AJAX Syntax (Toggle Plain Text)
function NumberReader()
{
  var i;
  this.n = prompt("Enter a list of numbers separated by spaces:", "").split(" ");
  for(i=0;i<this.n.length;i++)
  {
    document.write("<br />["+i+"] = "+this.n[i]);
  }
}
function NumberReader()
{
  var i;
  this.n = prompt("Enter a list of numbers separated by spaces:", "").split(" ");
  for(i=0;i<this.n.length;i++)
  {
    document.write("<br />["+i+"] = "+this.n[i]);
  }
}

Is this function correct?
I need help in writing mean function

JavaScript / DHTML / AJAX Syntax (Toggle Plain Text)
function meanCalculation()
         {
               var i;
               var sum;
              var mean;
             for(int i = 0; i<this.n.length;i++)
             {
function meanCalculation()
         {
               var i;
               var sum;
              var mean;
             for(int i = 0; i<this.n.length;i++)
             {

thanks,

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complexcodes

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Solved Threads: 1

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since Mar 2008

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Nov 21st, 2008

Re: calculate mean function!

Click to Expand / Collapse Quote originally posted by complexcodes ...

Hello,

I am supposed to write a program that prompts user to enter the numbers separated by space and when user click "ok" button, it should display the numbers entered with its mean, and standard deviation and the window should ask if user wants to enter numbers again if yes then it should display the new numbers entered, with its mean and standard deviation.

I created an external javascript file and embedded inside the strict XHTML file
here is what I got :-
JavaScript / DHTML / AJAX Syntax (Toggle Plain Text)
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title> Calculator</title>
<script type="text/javascript" src="mean.js"></script>
</head>
 
<body>
<p>This page calculates mean and standard deviation</p>
</body>
<script type="text/javascript">
var n=new Array();
</script>
</html>
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title> Calculator</title> <script type="text/javascript" src="mean.js"></script> </head> <body> <p>This page calculates mean and standard deviation</p> </body> <script type="text/javascript"> var n=new Array(); </script> </html>
I decide to write MeanCalculation function and standardDevationCalculation function and NUmberReader function

My NumberReader function is
JavaScript / DHTML / AJAX Syntax (Toggle Plain Text)
function NumberReader()
{
  var i;
  this.n = prompt("Enter a list of numbers separated by spaces:", "").split(" ");
  for(i=0;i<this.n.length;i++)
  {
    document.write("<br />["+i+"] = "+this.n[i]);
  }
}
function NumberReader() { var i; this.n = prompt("Enter a list of numbers separated by spaces:", "").split(" "); for(i=0;i<this.n.length;i++) { document.write("<br />["+i+"] = "+this.n[i]); } }
Is this function correct?
I need help in writing mean function
JavaScript / DHTML / AJAX Syntax (Toggle Plain Text)
function meanCalculation()
         {
               var i;
               var sum;
              var mean;
             for(int i = 0; i<this.n.length;i++)
             {
function meanCalculation() { var i; var sum; var mean; for(int i = 0; i<this.n.length;i++) {
thanks,

First thing, please remove keyword this. There is no need to use this.n ....
Rest is fine and I hope you will be able to solve it yourself. Still if you could not develop the function ... please provide the formulae for the mean and standard deviation.

Regards

Last edited by sasankasekhar; Nov 21st, 2008 at 6:38 am.

sasankasekhar

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Solved Threads: 3

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24 posts
since Jan 2007

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Nov 21st, 2008

Re: calculate mean function!

dude, javascript requires "this" to access instance variable. Please if you are not sure about anything dont try to help other people. You will just mess up their thinking. thanks,

complexcodes

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since Mar 2008

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Nov 23rd, 2008

Re: calculate mean function!

Hope that this will help you up...

javascript Syntax (Toggle Plain Text)
<html>
<head> 
<title>Calculator</title>
 
<script type="text/javascript">
 function numberReader()
{ x = [];
  n = prompt('Enter a number that is separated by "space" or ","','');
 m = n.replace(/(\s)|(\,)/g, '').slice();
for ( var i = 0; i < m.length; i++) { 
  x[i] = m[i]; }
 document.write((x[0]*1 + x[3]*1));
}
</script>
</head>
<body>
<br />
<br />
<p> This demo will convert UI value into an array and add it on the base reference.
(eg. Assuming that the array  x[0] has a value of 1 and x[3] has a value of 4, then the output result wil be 5. It will return NaN value if the ref is out of range! Hope it clears you up. Note that it should be separated by "space" or "," Enjoy...</p>
<p> <script type="text/javascript">
 
numberReader();
</script> </p>
</body>
</html>
<html>
<head> 
<title>Calculator</title>

<script type="text/javascript">
 function numberReader()
{ x = [];
  n = prompt('Enter a number that is separated by "space" or ","','');
 m = n.replace(/(\s)|(\,)/g, '').slice();
for ( var i = 0; i < m.length; i++) { 
  x[i] = m[i]; }
 document.write((x[0]*1 + x[3]*1));
}
</script>
</head>
<body>
<br />
<br />
<p> This demo will convert UI value into an array and add it on the base reference.
(eg. Assuming that the array  x[0] has a value of 1 and x[3] has a value of 4, then the output result wil be 5. It will return NaN value if the ref is out of range! Hope it clears you up. Note that it should be separated by "space" or "," Enjoy...</p>
<p> <script type="text/javascript">

numberReader();
</script> </p>
</body>
</html>

essential

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