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JavaScript - Generating A Random Number Taken From A Normal Distribution
Hello,
I need help creating a function in javascript that produces random numbers generated from a normal curve distribution with a mean and standard deviation that I can specify (and easily change). I would like only whole numbers and the ability to set reasonable maximum and minimums. Thanks, Adrian Similar Tutorials1st, Hi Coding forums! I'll get to the point, I'm a noob -.- I'm using greasemonkey for a certain website. Basically, I'm using gm to refresh the page after a certain time, I was however wondering, If I can set it to a random number between 2 specific times? The code I'm using atm is setTimeout(function() { document.location.reload(); } , 10000); I know I have to use math.random, well, I think I do. But I'm not sure how to do it between 2 certain times? So to summarise, I'm trying to refresh a page at any given random time between say 5-10 minutes. Any help is appreciated, thanks! I'm trying to find a much simpler way than this current script I am using to generate and print a random word. I don't want to have to name each word but instead just include a very large list of about 300,000 words that javascript uses to pull a random word out of. Can you please help me out?? The list of words I have is a straight list with no commas or anything. I am currently outputting to a text box, but I am looking to generate words according to users input. For example, a user wants 500 words starting with the letter "b" and is less than 5 characters long appended to the character "de." Any help would be awesome! Even a right direction. I'm also willing to pay some for such a script if need be. Thanks! Here's my code: Code: <SCRIPT LANGUAGE="JavaScript">
<!--
var NumberOfWords = 28
var words = new BuildArray(NumberOfWords)
words[1] = "czarevitch"
words[2] = "brightwork"
words[3] = "verkrampte"
words[4] = "protectrix"
words[5] = "nudibranch"
words[6] = "grandchild"
words[7] = "newfangled"
words[8] = "flugelhorn"
words[9] = "mythologer"
words[10] = "pluperfect"
words[11] = "jellygraph"
words[12] = "quickthorn"
words[13] = "rottweiler"
words[14] = "technician"
words[15] = "cowpuncher"
words[16] = "middlebrow"
words[17] = "jackhammer"
words[18] = "triphthong"
words[19] = "wunderkind"
words[20] = "dazzlement"
words[21] = "jabberwock"
words[22] = "witchcraft"
words[23] = "pawnbroker"
words[24] = "thumbprint"
words[25] = "motorcycle"
words[26] = "cryptogram"
words[27] = "torchlight"
words[28] = "bankruptcy"
function BuildArray(size){
this.length = size
for (var i = 1; i <= size; i++){
this[i] = null}
return this
}
function PickRandomWord(frm) {
var rnd = Math.ceil(Math.random() * NumberOfWords)
// Display the word inside the text box
frm.WordBox.value = words[rnd]
}
//-->
</SCRIPT>
New to JS, and not too good at it. Trying to take some prewritten code and add script that displays some random text. Having trouble with assignment. Instructions are to replace a section of the file I am given with a script element. In the script element I am suppose to declare a variable named tipNum equal to a random integer between 1 and 10 returned by the randInt() function (which I made and have shown below). Then I am suppose to use a series of document.write() methods to write the following HTML code into the page: Code: <h1>Random Tip<br />title</h1> <p>tip</p> (Where "title" is the title of the random text as generated by the tipTitle() function from a external file, and which I did not make; and "tip" is the text of the random tip as genereated by the tipText() function, which is also from the external file, and not made by me) My code for the randInt() function is Code: function randInt(lower, upper) {
var size = ++(upper - lower);
var randValue = Math.floor(lower + size*Math.random());
}
The script I made to display the HTML code is Code: <script type="text/javascript">
var tipNum = randInt(1, 10);
document.write("<h1>Random Tip<br />"+tipTitle(tipNum)+"</h1>");
document.write("<p>tipText()</p>");
</script>
I am getting nothing on my page where the random text should be. Any help or advice would be great, thanks. I want a certain amount of image spots to show a certain set of images (specifically 8) in a random order every time the page is refreshed. I do not want the images to be repeated, however. The solution I came up with was to create an array and generate a number one to eight and then compare that number to the numbers previously in the array, and if it matched one that was previously generated, to generate a new number and then compare it. This continues until i have an array of the numbers 1-8 in a random order. Code: var imgs=new Array(8);
for(i in imgs)
{
function generate()
{
return Math.floor(1+Math.random()*8);
}
var rand=generate();
function compare(i)
{
for(var n=i-1; n>=0; n--)
{
if (n<0)
{
imgs[i]=rand;
}
else
{
if (rand==n)
{
rand=generate();
compare(i);
}
}
}
}
}
This does not strike me as the most efficient way to go about this. If someone has a better solution, that would help a great deal. I am working on a work project that requires a 5*5 table, that will generate random letters in each cell upon button click. I have most of the coding complete with the exception of the letter generation. I am currently generating numbers, I would even be fine with having a RandBetween(and listing the 26 letters of the alphabet) at this point. Any suggestions? Code: <script type="text/javascript">
var random1, random2, random3, random4, random5, random6, random7, random8, random9, random10, random11, random12, random13, random14, random15, random16, random17, random18, random19, random20, random21, random22, random23, random24, random25;
var randomArray = [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0];
//generate the random characters
function CreateCellData() {
for (var i=0; i<randomArray.length; i++) {
randomArray[i] = Math.floor(Math.random()*99 + 1);
}
}
I can generate a random number between 1 and 9, ( var rand_no = Math.floor( 1 + Math.random() * 9 ); ) but I want to add that random number to a value that is enterred into an inputbox and get a total. How can I do this using Javascript and put the result into a hidden field. I will also need to use that same random number in another place on another form . Thanks I need to write something like this: http://justsheri.com/webscripting/wsassignment/1049950/ If you look at the code there is 52 of these <img src = './images/blank1.png' onClick='clickCard("qh",0)'/> where clickcard("numchanges", increments by 1) how is this done? Thanks Danny This is quite easy yet hard. I'm trying to apply something in my forums, where a member could post something let's say: "Hi, I am number [random]1, 6[/random]" And what would happen is that, a number from 1 to 6 would be the content, for example, it would be: "Hi, I am number 3" But if you refresh the page, it would still be the same number. Like it won't be randomized again. So how do I make a javascript/html code that would make a one time number randomizer. Sorry about the title, I didn't know what else to use to describe my problem. Basically, I'm generating a random word with a function; then I'm trying to pass this word down to another function. The problem is, when I pass the word, it changes each time (due to it being randomly generated originally). I'm only calling the function once (via button click), but I'm also calling the function in my code lower down to retrieve the returned variable; and the function seems to be running again and returning a new word from my array. Here's a snippet of my code: Code: function ranNum(){
var ranNum = Math.round(Math.random()*10);
var chosenWord = wordArray[ranNum];
return chosenWord;
}
function makeBoxes(x){
//remove children when new word is chosen
var hM = document.getElementById("hangMan");
while(hM.firstChild){
hM.removeChild(hM.firstChild);
}
var chosenWord = ranNum(x);
var wL = chosenWord.length;
//create box for length of letters in word
var i = 0;
for(i=0;i<wL;i++){
var cBoxes = document.createElement("div");
cBoxes.className = "letterBoxes";
cBoxes.innerHTML = chosenWord.charAt(i);
hangMan.appendChild(cBoxes);
}
return chosenWord;
}
function checkLetter(y){
var chosenWord = makeBoxes(y);
alert(chosenWord);
}
So I generate a word with one button; now I need to be able to work with said word in my checkLetter() function. The word changes however. Any help would be greatly received. Hi i'm trying to make a unique random number function but i''m stuck in an infinite loop here is what ive been trying below. basically i would like the output to be VolvoSaabBMW in a random order and it should NEVER be VolvoVolvoBMW or anything of the likes, each array item can should only be used once basically. Thanks for any help at all! Code: <html>
<body>
<script type="text/javascript">
var mycars = new Array();
mycars[0] = "Saab";
mycars[1] = "Volvo";
mycars[2] = "BMW";
var uniquerand = new Array();
var c = 0;
function randno(arrayname)
{
var i;
var b = 0;
var randomnumber=Math.floor(Math.random()*arrayname.length);
if(c == 1)
{
while (b<1)
{
for (i=0;i<uniquerand.length;i++)
{
if(uniquerand[i] != randomnumber)
{
document.write(mycars[randomnumber]);
uniquerand.push = randomnumber;
b = 1;
}
}
}
}
else
{
randomnumber=Math.floor(Math.random()*arrayname.length);
uniquerand.push = randomnumber;
document.write(mycars[randomnumber]);
c=1;
}
}
randno(mycars);
randno(mycars);
randno(mycars);
</script>
</body>
</html>
How would I generate a random number between 0 and 470 at multiples of 10 including 0 and 470?
I need help with a code that will generate a random number or integer (from 1-9). Does anybody know of a short random generator without having to import anything? thank you.
i have a table with a couple random numbers, and i want to click a button that will dynamically regenerate the numbers each time the button is clicked without re-generating the entire table., im using DOM and innerhtml for these random numbers. heres the javascript and html code. so far, it just generates the random numbers when the page loads. i posted this problem a while back, and the answers were great, but they coded the xhtml inside the html file. i'm trying to get the numbers to generate in the table that is formed in the javascript file using innerhtml. i tried to incorporate the solutions without putting the html inside the html file to no avail. var random = Math.floor(Math.random()*40 + 1) //sets variables for random numbers to generate var random2 = Math.floor(Math.random()*40 + 1) var random3 = Math.floor(Math.random()*40 + 1) var random4 = Math.floor(Math.random()*40 + 1) var random5 = Math.floor(Math.random()*40 + 1) var random6 = Math.floor(Math.random()*40 + 1) //create table function makeTable(lotto) document.getElementById("tableSpan").innerHTML = '<table border="1" id="lotto">'; var caption=document.getElementById('lotto').createCaption(); caption.innerHTML="JavaScript Random Numbers"; var x=document.getElementById('lotto').insertRow(0); var cell1=x.insertCell(0); var cell2=x.insertCell(1); var cell3=x.insertCell(2); var cell4=x.insertCell(3); var cell5=x.insertCell(4); var cell6=x.insertCell(5); cell1.innerHTML='<td class = "normal">'+ random +'</td>'; cell2.innerHTML='<td class = "normal">'+ random2 +'</td>'; cell3.innerHTML='<td class = "normal">'+ random3 +'</td>'; cell4.innerHTML='<td class = "normal">'+ random4 +'</td>'; cell5.innerHTML='<td class = "normal">'+ random5 +'</td>'; cell6.innerHTML='<td class = "red">'+ random6 +'</td>'; } heres the HTML file: <body onload="makeTable('lotto');"> <div id="container"> <div id="header"> <h1>Welcome</h1> </div> <div id="content"> <span id="tableSpan"></span> <input type="button" value="Re-generate Numbers" onclick="makeTable('lotto');" /> </div> { Hi, First, I'm a newbie in javascript and I need help to do something with a random numbers. I would like to put the result numbers in the "<td class="style1">#01</td>" section and an image in <td class="style1">img1</td> depending of the result number. Exemple : If the result number is #1 then the image Under the #01 will be an image associated to the number 1". Number 1 = "red circle.jpg", Number2 = "blue square.jpg", etc. Am I clear ? Here is my actual HTML canvas : -------------------------------------- <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Result</title> <style type="text/css"> .a1{ position:relative; font-family:Verdana; font-size:20px; color:#888888; } .style1 { text-align: center; } </style> <script language="JavaScript"> /***************************************** * Lottery Picker (By Kurt at kurt.grigg@virgin.net) * Featured on/available at Dynamic Drive DHTML(dynamic html) & JavaScript code library * Modified by DynamicDrive.com for below config options * This notice must stay intact for use. *****************************************/ var totalnumbers=6 //input total numbers to generate var lowerbound=1 //input lower bound for each random number var upperbound=49 //input upper bound for each random number function lotto(){ B=' '; LottoNumbers=new Array(); for (i = 1; i <= totalnumbers; i++) { RandomNumber = Math.round(lowerbound+Math.random()*(upperbound-lowerbound)); for (j = 1; j <= totalnumbers; j) { if (RandomNumber == LottoNumbers[j]) { RandomNumber=Math.round(lowerbound+Math.random()*(upperbound-lowerbound)); j=0; } j++; } LottoNumbers[i]=RandomNumber; } LottoNumbers=LottoNumbers.toString(); X=LottoNumbers.split(','); for (i=0; i < X.length; i++) { X[i]=X[i]+' '; if (X[i].length==2) X[i]='0'+X[i]; } X=X.sort(); for (i=0; i < X.length; i++) { OutPut=B+=X[i]; } if (document.all)document.all.layer1.innerHTML=OutPut; if (document.getElementById)document.getElementById("layer1").innerHTML=OutPut; if (document.layers){ document.layers.layer1.document.open(); document.layers.layer1.document.write("<span style='position:absolute;top:0px;left:0px;font-family:Verdana;font-size:20px;color:#888888;text-align:center'> "+OutPut+"</span>"); document.layers.layer1.document.close(); } T=setTimeout('lotto()',20); //window.status=OutPut; } function StOp(){ setTimeout('clearTimeout(T)',1000); } //--> </script> </head> <body> <table border='0' width=250 style="height: 146px"> <tr valign='middle'> <td align='center'> <form name=form> <input type=button value='Lottery Number Picker' onClick="lotto();StOp()"> </form> <span id=layer1 class=a1>Result</span> </td> </tr> </table> <table style="width: 250px; height: 100px" cellspacing="0" cellpadding="0"> <tr> <td class="style1">#01</td> //result number 1 have to be here <td class="style1">#02</td> //result number 2have to be here <td class="style1">#03</td> //result number 3 have to be here <td class="style1">#04</td> //result number 4 have to be here <td class="style1">#05</td> //result number 5 have to be here <td class="style1">#05</td> //result number 6 have to be here <td style="height: 50px" class="style1">#06</td> </tr> <tr> <td class="style1">img1</td> //associated image of the result number 1 have to be here <td class="style1">img2</td> //associated image of the result number 2 have to be here <td class="style1">img3</td>//associated image of the result number 3 have to be here <td class="style1">img4</td>//associated image of the result number 4 have to be here <td class="style1">img5</td>//associated image of the result number 5 have to be here <td class="style1">img6</td>//associated image of the result number 6 have to be here </tr> </table> </body> </html> -------------------------------------- Thank you very much to helping me to understand how to do it !! Sylvano Reply With Quote 12-22-2014, 05:36 PM #2 Philip M View Profile View Forum Posts Supreme Master coder! Join Date Jun 2002 Location London, England Posts 18,371 Thanks 204 Thanked 2,573 Times in 2,551 Posts This is hideously old and indeed crude code. document.all applied to IE4 and document.layers to Netscape 3. <script language="JavaScript"> and document.write() are also long obsolete. As is T=setTimeout('lotto()',20); I would suggest you get hold of a more up-to-date code. Simply rename your images 1.jpg, 2.jpg and so on, and display the appropriate one in its correct position. I'll give you a far better lottery number generator:- Code: <!DOCTYPE html>
<head>
</head>
<body>
<script type = "text/javascript">
function mylotto() {
var rlts = document.getElementById("results");
rlts.value = ''; // clear results
var srtrlts = document.getElementById("sortedresults");
srtrlts.value = ''; // clear results
var hmany = document.getElementById("howmany").value;
var max = parseInt(document.getElementById("maxnum").value);
if (isNaN(max) || max <= hmany) {
alert ("You must choose a number greater than " + hmany + " for the maximum number value!");
document.getElementById("maxnum").value = 49;
return false;
}
var numArray = new Array(max);
var chosen = new Array(hmany);
var uniqueList = new Array(hmany);
for (var i = 1; i <= max; i++) { // set up array 1 to max
numArray[i-1] = i;
}
Array.prototype.shuffle = function() {
var s = [];
while (this.length) s.push(this.splice(Math.random() * this.length, 1));
while (s.length) this.push(s.pop());
return this;
}
numArray.shuffle(); // shuffle the array
for (var i = 0; i < hmany; i++) { // take the first howmany items
uniqueList[i] = numArray[i];
}
rlts.value = uniqueList.join(" ");
srtrlts.value = uniqueList.sort(sortNumber).join(" ");
function sortNumber(a,b) {
return a - b;
}
//alert ("The unsorted random numbers a - \n" + uniqueList)
//alert ("The sorted unique random numbers a - \n" + uniqueList.sort(sortNumber));
}
</script>
<p>UNIQUE NUMBERS LOTTERY PICKER</p><br>
<form>
Select How Many Unique Numbers <select id="howmany">
<option value=1>1</option>
<option value=2>2</option>
<option value=3>3</option>
<option value=4>4</option>
<option value=5>5</option>
<option value=6 selected>6</option>
<option value=7>7</option>
<option value=8>8</option>
<option value=9>9</option>
<option value=10>10</option>
</select>
<br>
Enter the Maximum Number Value  <input type="text" id = "maxnum" value="49" size="2"><br><br>
<input type="button" value="Here we go!" onclick="mylotto()">
<br><br>
Unsorted Results:- <input type = "text" id = "results" size = "60"><br>
Sorted Results:-     <input type = "text" id = "sortedresults" size = "60">
</form>
</body>
</html>
Quizmaster: In which river did John the Baptist baptise Jesus? Contestant: The Amazon I am makeing a dice game and this is how i generate the numbers
Code: var randomnumber1=Math.floor(Math.random()*13) But i have to relaode the page each time to randomize it again. How can i do this with out reloading the page? I am using a button to set the function of. I've looked everywhere for a random number generator which doesn't repeat. Tried loads and none have seemed to work. I'm making a quiz, 5 questions so far. This button, in html, generates the next random Q: Code: <input type="button" value="Next (random)" name="B0" onClick="rangen();generatequestions();qnum()"><br><br> Lower down in the javascript (in the body), here is the rangen() function: Code: function rangen(){
whichone=Math.floor(Math.random()*5)
}
But I need a random generator which fires them off only once. For reference, here is the next bit (not so important): Code: var whichone=1;
var q=1;
var tempmn=document.instantquiz.thequestion
function generatequestions(){
if (q>0)
q=q++
if (loop>0)
loop=0
document.instantquiz.theresponse.selectedIndex=0
if (!document.instantquiz.cmode.checked||whichone>=total+1||whichone<=0)
document.instantquiz.thesolution.value=''
if (whichone>=total+1)
tempmn.value="End of quiz"
else{
tempmn.value=whichone+")"+question[whichone]+"\n\n"+"a)"+eval('choice'+whichone+'[1]')+"\n"+"b)"+eval('choice'+whichone+'[2]'
)+"\n"+"c)"+eval('choice'+whichone+'[3]')+"\n"+"d)"+eval('choice'+whichone+'[4]')
if (document.instantquiz.cmode.checked)
document.instantquiz.thesolution.value=solution[whichone]
}
}
Anyone have suggestions for a non-repeating random number gen which will work? Even the one now seems to have some slight error associated with it. The one's ive tried so far haven't worked.. hi all, i was hoping somebody could help me out. i'm trying to write a code that generates a random number between 1 and 9999 on page load, concatenates it with "pwn" at the start, and adds it to a disabled form text input box. this is the code i have below, but it's not working at all. any help would be greatly appreciated. in the head section Code: <script type="text/javascript">
function createcode()
{
var randomnumber = Math.floor(Math.random()*10000);
var homecode = 'pwn' + randomnumber;
}
</script>
my body tag Code: <body onload="createcode()"> and the form field itself Code: <input type="text" name="homename" id="homename" disabled="disabled" />
<script type="text/javascript">
document.getElementByID("homename").value = homecode;
document.write(homecode);
</script>
thanks in advance. Hello, There isa demo below. I have a form and select menus. I am posting it ajax post method and loading the same page with load method as you see in codes. There is a random number genarator. I want to change this random number once a click submit. If i do not load the same page this number does not change. Therefore I use both post and load methods like in demo. However when i do like this there is a problem which is random number have been generated twice somtimes. If you click submit button successively you will see that the number on left top corner sometimes changes twice a click. Why it is so and how can i correct it. Thanks in advance and sorry for my bad English Demo: http://fcbk.imeee.org/test.php test.php PHP Code: <?php print_r($_POST['soru']); echo rand(5, 15); ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Untitled Document</title> <link href="style.css" media="screen" rel="Stylesheet" type="text/css"> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script> <script type="text/javascript"> $(document).ready(function() { $("#submit").click(function(event){ $.post( "test.php", $("#sorular").serializeArray(), function(data) { $('#results').html(data); } ); $(".arkadaslar").load("test.php?r=1"); }); }); </script> </head> <body> <?php if(!$_POST):?> <?php if($_GET['r']!=1):?> <ul class="arkadaslar"> <?php endif;?> <form name="ss" id="sorular"> <?php for($i = 1; $i <= 4; $i++):?> <table width="100%" border="0" align="left" cellpadding="0" cellspacing="0"> <tr> <td width="70%" align="left" valign="top"></td> <td width="30%" align="left" valign="top"> <label> <select name="soru[]" size="1" id="select"> <option>Give point</option> <option value="1">1</option> <option value="2">2</option> <option value="3">3</option> <option value="4">4</option> <option value="5">5</option> <option value="6">6</option> <option value="7">7</option> <option value="8">8</option> <option value="9">9</option> <option value="10">10</option> </select> </label> </td> </tr> </table><br /><br /> <?php endfor; ?> <input id="submit" type="button" value="Submit"> </form> </ul> <?php endif;?> <p><tt id="results"> </tt></p> </body> </html> Hi, I have a 'Register' page on my site. When someone registers to my website, I would like to make it necessary to have a div box which generates a random number/letter, which is linked to a text field where the user has to match the generated output. I've been sitting here wondering which would be the best route to take regarding completing this. I was thinking about using charAt() method. Could anybody please possibly give me some tips for generating random letter/numbers? Possibly would I create a string containing "ABCDE....Z0123456789", then use the charAt method to find a character at a certain index position? If so, would I need create something which generates a random index position? Any help would be fantastic, thank-you. |
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