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Generate Random Number, use it & save it in answers

J.Auer
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1 year 1 month ago - 1 year 1 month ago #259451 by J.Auer

Generate Random Number, use it & save it in answers was created by J.Auer

Your LimeSurvey version: 6.4.12

Hello!

I'm in the process of setting up an initial assignment for participants, giving each either a 0 or 1. This will dictate which link opens in fullscreen upon pressing a button. (In my context, these correspond to Game Version 1 or Game Version 2, in this example Bing & Google).
I thought this would be the most efficient way to get balanced a 50/50 chance for both links.I've managed to implement this successfully using the code provided below. However, I'm now interested in storing the assigned number (either 0 or 1) to track this in the final responses.I've tried to set it as an answer to a follow-up question, but can't get it to work.

What steps should I take next, or is there a more effective approach to address my requirement?

relevant code:

Code:

<p>Random Number:</p>
<p id="randomValue"> </p>
 
<script>
    var randomValue = rand(0, 1);
    document.getElementById("randomValue").innerText = "Zufallszahl: " + randomValue;
  
    function openFullscreenPopup(url) {
        var width = screen.width;
        var height = screen.height; 
        var popupWindow = window.open(url, 'popupWindow', 'width=' + width + ', height=' + height + ', left=0, top=0');
        if (window.focus) {
            popupWindow.focus();
        }
        return false;
    }
 
    function openVersion() {
        var gameVersion = (randomValue < 0.5) ? 'https://www.bing.com' : 'https://www.google.com';
 
        openFullscreenPopup(gameVersion);
    }
 
</script>
<button class="my-button" onclick="openVersion(); return false;">Open in Fullscreen</button>

Last edit: 1 year 1 month ago by J.Auer.

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tpartner
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1 year 1 month ago #259454 by tpartner

Replied by tpartner on topic Generate Random Number, use it & save it in answers

If your code is in the source of a sort-text question, you can load that input like this:

Code:

$('#question{QID} :text.form-control:eq(0)').val(randomValue).trigger('keyup);

Cheers,
Tony Partner
Solutions, code and workarounds presented in these forums are given without any warranty, implied or otherwise.

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J.Auer
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1 year 1 month ago #259460 by J.Auer

Replied by J.Auer on topic Generate Random Number, use it & save it in answers

Thank you for your input!
I'm not quite sure how to implement that, though. I've created a sorting question using my code. In the first answer, I included your code and tried it like this for example:

Code:

<script>  $('#question{31} :text.form-control:eq(0)').val(randomValue).trigger('keyup);  </script>

However, it doesn't seem to work, so I must be doing something wrong for sure.
I would greatly appreciate if you could provide a more detailed instructions on how to implement this. Thanks in advance!

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Joffm
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1 year 1 month ago - 1 year 1 month ago #259463 by Joffm

Replied by Joffm on topic Generate Random Number, use it & save it in answers

You should not change {QID}
{QID} is a system variable that always returns the actual QuestionID.
Same wirh
{SID}: Survey ID
{GID}: Group ID
{SAVEDID}: Response ID
and many more.

And put it at the end of the script where you generate the randomvalue, e.g. before "openFullscreen".

Joffm

Volunteers are not paid.
Not because they are worthless, but because they are priceless

Last edit: 1 year 1 month ago by Joffm.

The following user(s) said Thank You: tpartner

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J.Auer
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1 year 1 month ago - 1 year 1 month ago #259535 by J.Auer

Replied by J.Auer on topic Generate Random Number, use it & save it in answers

Thank you for your explanation! That makes sense now!However, I'm still encountering difficulties in making this work. After adding the provided line of code, I noticed that the RandomValue is no longer displayed in the text itself, and the button no longer opens the link. Additionally, the RandomValue is not being logged in the first answer. I've attempted this with different question types as well. Is there still something I might be missing?

Code:

<p>Here is the Random Number:</p>
 
<p id="randomValue"> </p>
<script>
    var randomValue = rand(0, 1);
 
    document.getElementById("randomValue").innerText = "Random Number: " + randomValue;
  
     $('#question{QID} :text.form-control:eq(0)').val(randomValue).trigger('keyup);
 
    function openFullscreenPopup(url) {
        var width = screen.width;
        var height = screen.height;
        var popupWindow = window.open(url, 'popupWindow', 'width=' + width + ', height=' + height + ', left=0, top=0');
        if (window.focus) {
            popupWindow.focus();
        }
        return false;
    }
 
    function openVersion() {
        var gameVersion = (randomValue < 0.5) ? 'https://www.bing.com' : 'https://www.google.com';
        openFullscreenPopup(gameVersion);
    }
</script><button class="my-button" onclick="openVersion(); return false;">Open in Fullscreen</button>

I also attached a screenshot of how this looks in the preview

Last edit: 1 year 1 month ago by J.Auer.

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J.Auer
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1 year 1 month ago - 1 year 1 month ago #259552 by J.Auer

Replied by J.Auer on topic Generate Random Number, use it & save it in answers

Here's a fix ChatGPT gave me. It seems to work properly now, not sure if this is the best solution, but it fixes my problem!

Code:

<p>Here is the Random Number:</p>
 
<p id="randomValue"> </p>
<script>
 
    var randomValue;
 
    $(document).ready(function() {
        randomValue = rand(0, 1);
        document.getElementById("randomValue").innerText = "Random Number: " + randomValue;
        
        $('#question{QID} :text.form-control:eq(0)').val(randomValue).trigger('keyup');
    });
 
    function openFullscreenPopup(url) {
        var width = screen.width;
        var height = screen.height;
        var popupWindow = window.open(url, 'popupWindow', 'width=' + width + ', height=' + height + ', left=0, top=0');
        if (window.focus) {
            popupWindow.focus();
        }
        return false;
    }
 
    function openVersion() {
        var gameVersion = (randomValue < 0.5) ? 'https://www.bing.com' : 'https://www.google.com';
        openFullscreenPopup(gameVersion);
    }
</script><button class="my-button" onclick="openVersion(); return false;">Open in Fullscreen</button>

Last edit: 1 year 1 month ago by J.Auer.

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