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JavaScript - Javascript Standard Deviation
Hello, i'm all a bit new to javascript and i'm finding it all a bit of a struggle. Using this code i'm looking to allow the user to calculate the mean and standard deviation of scores once they press an appropriate button. Despite looking up many different solutions online i cant get the code to work. Any hints or tips would be hugely appreciated.
Code: <html>
<head>
<title>Student Test Scores</title>
<script language="JavaScript">
var studentNameArray = new Array();
var studentScoreArray = new Array();
function addToNameAndScoreArray()
{
var studentName = document.form.inputStudentName.value;
studentNameArray.push(studentName);
document.form.nameOutput.value = studentNameArray;
var studentScore = document.form.inputStudentScore.value;
studentScoreArray.push(studentScore);
document.form.scoreOutput.value = studentScoreArray;
}
function display()
{
var str="<br>"+"<b>"+"Student Name And Sco "+"</b>";
for(i=0;i<studentNameArray.length;i++)
{
str=str+"<br>"+studentNameArray[i];
str=str+": "+studentScoreArray[i];
}
document.getElementById('displayArray').innerHTML= str;
}
</script>
</head>
<body>
<center>
<h1>Student Scores</h1><br>
<form name="form">
Type the students name and score into the appropriate boxes in the <strong>Input Area</strong> below, then click
the <strong>Add This Record button</strong>. <br>
Click the <strong>Display/Refresh Student Grades</strong> button to show the data thats been entered. <br>
The mean and standard deviation can then be calculated when the appropriate buttons are pressed.
<p>
<br>
<hr>
<h2>Input Area</h2>
<p>
<input type="button" onClick="window.location.href=window.location.href" value="Start A New Session"/>
<input type="button" onClick="saveCurrentSession();" value="Save Current Session"/><br><br>
Student Name: <input type="text" name="inputStudentName" value=""/><br><br>
Student Sco <input type="text" name="inputStudentScore" value=""/><br><br>
<input type="button" onClick="addToNameAndScoreArray();" value="Add This Record"/><br><br>
<input type="button" onClick="removeStudent(name);" value ="Delete This Record"/>
<input type="hidden" size="75" name="nameOutput" value=""/><br>
<input type="hidden" size="25" name="scoreOutput" value=""/><br>
<input type="button" value="Display/Refresh Student Grades" name="button1" onClick="display()"/><br><br>
<div id ="displayArray"></div><br>
<hr>
<br>
<h2>Statistics</h2>
<p>
<input type="button" onClick="" value="Mean"/>
<input type="button" onClick="" value="Std. Var."/><br><br>
<input type="text" size="15" name="Mean" value=""/>
<input type="text" size="15" name="StdVar" value=""/>
</center>
</body>
</html>
Similar TutorialsHi there, Ive done this so far but I am finding it difficult to calculate the mean and standard deviation. If someone could help me out I would very very grateful. Thanks in advance, Chris. P.s This is my code so far below. <html> <head> <style type="text/css"> body { background-image:url('Background.jpg') } </style> <style type="text/css"> .container { text-align:center; } .center { margin-left:auto; margin-right:auto; width:37.5%; text-align:left; } </style> <title>Student Results</title> <script language="javascript"> function addRow() { var newRow = document.all("tblGrid").insertRow(); var oCell = newRow.insertCell(); oCell.innerHTML = "<input type='text' name='t1'>"; oCell = newRow.insertCell(); oCell.innerHTML = "<input type='text' name='t2'>"; oCell = newRow.insertCell(); oCell.innerHTML = "<input type='text' name='t3'> <input type='button' value='Delete' onclick='removeRow(this);'/>"; } function removeRow(src) { var oRow = src.parentElement.parentElement; document.all("tblGrid").deleteRow(oRow.rowIndex); } </script> </head> <body> <div class="container"> <div class="center"> <hr> <table id="tblGrid" style="table-layout:fixed"> <tr> <td width="150px">SID</td> <td width="150px">NAME</td> <td width="250px">MARK</td> </tr> <tr> <td><input type="text" name="t1" /></td> <td><input type="text" name="t2" /></td> <td><input type="text" name="t3" /> <input type="button" value="Delete" onclick="removeRow(this);" /></td> </tr> <tr> <td><input type="text" name="t1" /></td> <td><input type="text" name="t2" /></td> <td><input type="text" name="t3" /> <input type="button" value="Delete" onclick="removeRow(this);" /></td> </tr> <tr> <td><input type="text" name="t1" /></td> <td><input type="text" name="t2" /></td> <td><input type="text" name="t3" /> <input type="button" value="Delete" onclick="removeRow(this);" /></td> </tr> <tr> <td><input type="text" name="t1" /></td> <td><input type="text" name="t2" /></td> <td><input type="text" name="t3" /> <input type="button" value="Delete" onclick="removeRow(this);" /></td> </tr> </table> <hr> <input type="button" value="Add Row" onclick="addRow();" /> <hr> </div> </div> </body> <script language="JavaScript"> var pagetitle = document.title; var action = ""; var amount = "0"; var order = ""; var scriptlocation = "/stats/track.asp"; var pagedata = 'mtpt=' + escape(pagetitle) + '&mtac=' + escape(action) + '&mta=' + amount + '&mto=' + escape(order) + '&mtr=' + escape(document.referrer) + '&mtt=2&mts=' + window.screen.width + 'x' + window.screen.height + '&mti=1&mtz=' + Math.random(); document.write ('<img height=1 width=1 '); document.write ('src="' + scriptlocation + '?' + pagedata + '">'); </script> </html> Hi All, Im trying to write a html with javascript page that reads values from an XML file and outputs to a table. Thats easy i hear you say? Trouble is the application that is outputing the XML file doesnt output a simple XML file. Below is a section of the file: Code: <?xml version="1.0" encoding="UTF-8"?> <CVES name="EUREX" datetime="09 Aug 10 14:40:41"> <thread name="DB 0" state ="active" nb="0" tempo="00:00:02" action="Wait"/> <thread name="DB 1" state ="active" nb="0" tempo="00:00:02" action="Wait"/> <thread name="match" state ="active" nb="0" tempo="00:00:02" action="Wait"/> <MatchingList> <Tickets value="142"/> <TicketsCleared value="23"/> <TicketsNotCleared value="119"/> <Orders value="21"/> <OrdersCleared value="21"/> <OrdersNotCleared value="0"/> </MatchingList> <thread name="exch 1" state ="active" nb="0" tempo="00:00:10" action="Wait"/> <Exchange> <Tickets value="142"/> <TicketsWithUnknownExternalCodes value="212"/> <ClearingInProgress value="4"/> <Clearing> <AverageClearingTime value="00:00:00"/> <LastClearingTime value="14:26:37"/> <LastUnclearingTime value="14:27:55"/> <TotalQtyCleared value="705"/> <TotalQtyUnCleared value=""/> </Clearing> <Reading> <LastReadingTime value="14:40:31"/> <NextReadingTime value="14:41:00"/> im able to read the contents of the CVES tag (Name and datetime) but cannot get any others to load. how can i get details from LastReadingTime? Thread name="Exch 1" Having googled reading XML into HTML file and cannot find anything that covers this kind of xml file THanks I have the non-standard element Code: <testele></testele> In every browser except IE, this bit of JavaScript will successfully change the content of the above element Code: document.getElementsByTagName("testele")[0].innerHTML = 'hi';
However, if I change the <testele> to just a <span> (in the HTML and the JavaScript), it now successfully changes the content of the element in every browser, including IE. Is there any fix? I have searched around and tried a bunch to no avail. Thanks! Hello! I am trying to find a script that allows you to open multiple browser tabs and then close each of those tabs, either one by one or all at once. Does anyone know how to do this please? Thanks so much for your help. I want to have another go at Javascript. I have several books on the subject but I find that my eyesight is a major problem. Therefore I want to try an on-line solution, preferably free. I have Googled, but there are so many that I am almost dizzy with the choices. Perhaps someone could recommend one. Not too fussy visually. My knowledge is VERY basic. Frank Does anyone know how to make URL links that use Javascript still work when users have Javascript disabled on their browser? The only reason I'm using JS on a URL is because my link opens a PDF file, and I'm forcing it not to cache so users have the latest version. I tried the <script><noscript> tags, but I'm not sure if I'm using it correctly, as my URL completely disappears. Below is my HTML/Javascript code: <p class="download"> <script type="text/javascript">document.write("<span style=\"text-decoration: underline;\"><a href=\"javascript:void(0);\" onclick=\"window.open( 'http://www.webchild.com.au/mediakit/Direct_Media_Kit_Web.pdf?nocache='+ Math.floor( Math.random()*11 ) );\" >The Child Magazines Media Kit</a></span> (PDF 1 MB) ");</script> <noscript><span style="text-decoration: underline;"><a href="http://www.webchild.com.au/mediakit/Direct_Media_Kit_Web.pdf" >The Child Magazines Media Kit</a></span> (PDF 1 MB)</noscript> </p> Thanks for any help, Michael Hi, I have the following code snippet: test.html ====== <script language="javascript" type="text/javascript"> var testVariable = "test"; </script> <script language="javascript" type="text/javascript" src="test.js"> </script> test.js ===== var testVariable = window.top.testVariable; In firefox, I'm able to access testvariable defined within test.html in test.js. But in chrome, test.js couldnot get the window.top.testVariable field defined in test.html. Can any one please let me know how i can make it work in chrome?. Am i missing something here?. Hi Guys, I am new at JavaScript and start to do some tutorials.What I am trying to do here is prompting user to input a name and if the name was valid the page(document) will display with all objects like the button.But if user enter a wrong name then the button will be disabled! I create the following code but it did not work <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>New Web Project</title> <script language="JavaScript" type=""> function changeColor(){ document.bgColor = "Gray"; } </script> </head> <body> <script language="JavaScript" type="text/javascript"> var person = ""; person = prompt('What is Your Name:'); if (person == "Foo") { document.write("<h1 />Welcome " + person); document.bgColor = "Yellow"; } else { document.write("<h1 />Access Denied!!!!"); document.bgColor = "Red"; document.getElementById("gree").disabled = true; } </script> <div> <p/><input id="gree" type="button" value="Gray " onClick="changeColor();"> </div> </body> </html> as you can see I used the: document.getElementById("gree").disabled = true; but it did not work , could you please give an idea how I can solve this problem? Thanks I want to insert this js snippet Code: function addText(smiley) {
document.getElementById('message').value += " " + smiley + " ";
document.getElementById('message').focus();
return false;
}
to a loaded iframe with name&id chtifrm. I can access it & change embed something in its html via using something like: Code: $(parent.chtifrm.document.body).append('<div id=\"smly\" style=\"cursor:pointer;float:left;top:200px;display:none;position:absolute;\"><\/div>');
.... Code: parent.chtifrm.document.getElementById('chatbox_option_disco').style.display == 'none'
but how do I insert js in the head of loaded iframe? Hey, I've got to make the values of some textboxes change the co-ordinates of my sprite on a canvas and havent a clue on how to do it, Here is my form with the two textboxes and submit button: <form> x: <input type="text" name="x" /><br /> y: <input type="text" name:"y" /><br /> <input type="submit" value="Submit"/><br /> </form> And i need it so that they change the values of these: //this shows where my sprite will start on the canvas var block_x; var block_y; searched the internet for hours and cant really find anything i understand or works. any help is much appreciated Hi Guys I am trying to modify the functionality of my page. I want to be able to activate this piece of code using another javascript function. This is the code I want to activate: Code: <script type="text/javascript"><!--
$('#button-cart').bind('click', function() {
$.ajax({
url: 'index.php?route=checkout/cart/update',
type: 'post',
data: $('.product-info input[type=\'text\'], .product-info input[type=\'hidden\'], .product-info input[type=\'radio\']:checked, .product-info input[type=\'checkbox\']:checked, .product-info select, .product-info textarea, .date_data input[type=\'text\']'),
dataType: 'json',
success: function(json) {
$('.success, .warning, .attention, information, .error').remove();
if (json['error']) {
if (json['error']['warning']) {
$('#notification').html('<div class="warning" style="display: none;">' + json['error']['warning'] + '<img src="catalog/view/theme/default/image/close.png" alt="" class="close" /></div>');
$('.warning').fadeIn('slow');
}
for (i in json['error']) {
$('#option-' + i).after('<span class="error">' + json['error'][i] + '</span>');
}
}
if (json['success']) {
$('#notification').html('<div class="success" style="display: none;">' + json['success'] + '<img src="catalog/view/theme/default/image/close.png" alt="" class="close" /></div>');
$('.success').fadeIn('slow');
$('#cart_total').html(json['total']);
$('html, body').animate({ scrollTop: 0 }, 'slow');
}
}
});
});
//--></script>
And this is how I want the format of the function to be: function testsession() { if there is a session called 'hiredate' { activate the script above } else { var el = document.getElementById("product_data"); } } I just dont know how to write this in javascript Could you help me if possible please I got an index.php Code:
<html>
<form action="bacakomik.php" method='post'>
<select name="kodekomik">
<option value='../komik1/|23'>Judul Komik1</option>
<option value="../komik2/|20">Judul Komik2</option>
<option value="../komik3/|10">Juduk Komik3</option>
<option value="../komik4/|20">Judul Komik4</option>
</select>
<input type="submit" />
</form>
<?php
echo ('<select>');
echo ('<option value= "'.$i.'">'.'Page '.$i.'</option>');
echo ('</select>');
?>
</html>
As you can see, each of the option brings specific value "../komik1/|23" komik1 is a directory | is a delimiter 23 is the pages in one chapter and can be considered also as how many images are there on a specific directory This is my bacakomik.php Code: <?php
$dirkomik = $_POST['kodekomik'];
$exploded = explode("|", $dirkomik);
echo ($exploded[0]); //picture directory
echo ("<br>");
echo ($exploded[1]); //total page in the comic
$pagecount = (int)$exploded[1];
//Take last posted value, process it right away
echo ('<FORM name="guideform"> ');
echo ('<select name="guidelinks">');
$i=1;
do {
echo ('<option value= "'.$i.'">'.'Page '.$i.'</option>');
$i= $i+1;
}while($i <= $pagecount); //Printing option and select
echo ("</select>");
?>
<input type="button" name="go" value="Go!" onClick="document.getElementById('im').src=document.guideform.guidelinks.options[document.guideform.guidelinks.selectedIndex].value+'.png';"> </FORM>
<img src="img0.jpg" id="im">
With the current code on bacakomik.php, I only can change the img src of id "im" in the same directory only. What I want is that the Javascript could "add" the "$exploded[0]" variable so that the picture can be loaded from different directory. Anyone can do this? I believe that the fix should be somewhere on input tag inside OnClick, or do you know where? Anyway, I found this on the net http://p2p.wrox.com/php-faqs/11606-q...avascript.html Please help me to those who can... All -- I have a JavaScript config file called gameSetting.js which contains a bunch of variables which configures a particular game. I also have a shared JavaScript library which uses the variables in gameSetting.js, which I include like so: <script type="text/javascript" src="gameSetting.js" ></script> <script type="text/javascript" src="gameLibrary.js" ></script> In gameSetting.js I have: $(document).ready(function() { // call some functions / classes in gameLibrary.js } in Firefox, Safari, and Chrome, this works fine. However, in IE, when it's parsing gameSetting.js, it complains that the functions that live in gameLibrary.js aren't defined. When it gets to parsing gameLibrary.js, the variables in gameSetting.js are reported as not being defined. I've tried dynamically bootstrapping the gameLibrary file using this function in document.ready for dynamic load... $.getScript("gameLibrary.js"); However, the same problem still happens in IE, where when it parses the files individually it's not taking into context the file/variables that came before, so it's not an out of load order problem. My options a 1) collapsing all the functions in gameLibrary.js and variables in gameSetting.js into one file. However, this is not practical because this is dealing with literally hundreds of games, and having a gameLibrary.js in ONE location for ONE update is what makes most logical sense. 2) figure out a way to get this to work where variables in file1 are accessible to file2 in IE (as it seems they are in other browsers). jQuery seems to be able to have multiple plugins that all refer to the based jQuery-1.3.2.js, so I know there is a way to get this to work. Help appreciated. Nero I wrote a log function that took note of various function calls. Thinking that functions are first class objects, and objects have properties, I made the name of each logged function a property of that function, e.g., brightenInnerPara.name = "brightenInnerPara"; Every browser I tried (Firefox, MSIE, Opera, Chrome, Safari) accepted the assignment, no problem. In Firefox and MSIE, the result was what I wanted: brightenInnerPara.name == "brightenInnerPara" But in the others, the result was: brightenInnerPara.name == null Question 1. Which Javascript is correct here? I favor Firefox and MSIE, not merely because they were willing to give me what I wanted, but also because it makes no sense to accept an assignment statement without throwing an error and then give it a null semantics, like Chrome, Opera, and Safari did. I found a workaround, using assignments like this: brightenInnerPara.prototype.name = "brightenInnerPara"; To my surprise, that worked in every browser. But I don't know why. It seems that such assignments are enough to cause each function to have its own distinct prototype. Question 2. Just how inefficient is my workaround, and why does it work? I'm new and am not sure if this is the right section but this was my assignment for my intro to programming class. I was absent the day of the lesson and didn't understand much, so this is what I have. jsfiddle I don't know how to put more than one phrase in the alert box, how to keep a running total of the numbers entered & I can't seem to get a counter to work on the second button. Please and Thank you for any help. I want a script that go back in history after 3 sec on loading a page. <a href="javascript:history.go(-1)">Go back</a> This script let you go back in history but i want that its automatically execute after 3 sec. Please help. Hi everyone, I'm trying to generate a drop down list using a supplied xml form with an xsl sheet. Because xsl lacks commands that will allow me to create repetitive <options> I am using javascript. A sample xml file that I am using is bellow. Code: <?xml version="1.0" encoding="ISO-8859-1"?> <?xml-stylesheet type="text/xsl" href="a.xsl"?> <Country> <California> <County>San Diego</County> <County>Los Angeles</County> </California> <Nevada> <County>Reno</County> <County>Las Vegas</County> </Nevada> </Country> The xsl file that I'm using is show below. Code: <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="/">
<html>
<head></head>
<body>
<p>This loaded</p>
<form>
<select name='County'>
<script type="text/javascript">
var i=3;
while(i > 0){
document.write("<option><xsl:value-of select='Country/California/County[");
document.write(2);
document.write("]'/></option>");
i--;
}
</script>
</select>
</form>
<script type="text/javascript">
var i=3;
while(i > 0){
document.write("<xsl:value-of select='Country/California/County[");
document.write(2);
document.write("]' /> <br />");
document.write("<xsl:value-of select='Country/California/County[2]'/><br />");
i--;
}
</script>
</body>
</html>
</xsl:template>
</xsl:stylesheet>
Bassically all I'm trying to do is list the counties under california. My problem is that the javascript will print the list no problem but it only prints san diego even if my xpath index = i, is set to two. When i is set to 2, it should display Los Angeles. The following sample code will display Los Angeles Code: document.write("<xsl:value-of select='Country/California/County[2]' />");
However when the document has i = 1, it should display san diego. Unfortunately when i use i = 2 and write ... Code: document.write("<xsl:value-of select='Country/California/County["
document.write(i);
document.write("]' />");
or even Code: document.write("<xsl:value-of select='Country/California/County[");
document.write(2);
document.write("]' />");
The xsl sheet will display san diego instead. If the code is used without brackets you can see that everything is being displayed correctly ... for instance writting Code: document.write("xsl:value-of select='Country/California/County["
document.write(i);
document.write("]' /");
will result in .. Code: xsl:value-of select='Country/California/County[2]' / Why is xsl doing this to me? OK .. Solved ... there was a typing mistake in the code Today is my first day to start learning JavaScript. When i try to run the following code (copy-paste from a book), the browser gives me an error. Can you please tell me what's wrong with the following code: <HTML> <HEAD> <SCRIPT LANGUAGE = "JavaScript"> function upperMe(){ document.converter.output.value = document.converter.input.value.toUpperCase() } </SCRIPT> </HEAD> <BODY> <FORM NAME = "converter"> <INPUT TYPE = "text" NAME = "input" VALUE="sample" onChange="upperMe()"> <INPUT TYPE = "text" NAME = "output" VALUE="sdf"> </FORM> </BODY> </HTML> Thanks Ahmad Hi guy's Not sure if what i want to do is possible, i am a very basic computer user and any help would be great. i have a relay that is conect to my router and if i type the following into the address bar it turns it on for 2 seconds. "http://192.168.1.68/state.xml?relayState=2" What i would love to do is be able to add a book mark which once selected it fires off the above string and closes the window without a prompt, is this possible??? i have spent hours and hours and seem to be going nowhere. Thanks for all your help Daniel PHP Code: var values = { value1: 6, other: { value2: values.value1 + 1 } } Why can that not work? Is there something like this.parent.value1? |
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