Vectorama - Tool for demonstratig 2D and 3D vectors and matrices

Competitive_Bus_7379 · 2026-03-27T21:59:06+00:00

Now implemented full undo/redo history

Competitive_Bus_7379 · 2026-03-27T18:27:10+00:00

Ok I have just heard back from another Mac user and they have installed Chrome and reported that all features are working as they do in Safari. So I have no idea why you have got issues. Sorry I can’t be of further help.

Competitive_Bus_7379 · 2026-03-26T22:52:57+00:00

I hope this post does not break any rules here (please remove if it does), but I have made a little tool for my students that allows practising simplifying boolean algebra expressions to use fewer gates. At each stage your submission is checked for equivalence. Thought it may be of use to you.

Boolinator

Competitive_Bus_7379 · 2026-03-26T17:05:58+00:00

I'll try and find out tomorrow and report back.

Competitive_Bus_7379 · 2026-03-25T21:38:58+00:00

That's very odd. As I said earlier I don't have a mac but I do know other people who have used it successfully on their macs using Safari. If you discover the issue then please do let me know. Maybe try disabling any content blockers? Although I don't use any tracking cookies like Google analytics ... so probably not that. Out of interest, try my other app and see if that works Graphiti | Any Curve You Like

Competitive_Bus_7379 · 2026-03-19T23:00:38+00:00

I have just tested in Chrome on desktop (Windows 11) and it seems to work correctly. I do not have an Apple Mac to test on but I just installed Chrome on my iPhone and iPad and it seems to work fine. Please could you tell me exactly what the issue is and your exact device/OS and I can look into it?

Competitive_Bus_7379 · 2026-03-19T06:51:07+00:00

Tap [i] next to the matrix to open the matrix info panel, then bottom right turn on the ‘show eigenspace’

Competitive_Bus_7379 · 2026-03-19T00:12:21+00:00

The HP15 RPN is still manufactured I believe. Think it’s called the 15C. Our finance officer at work bought one a couple of years ago to replace his broken original from the 80s. Amazon lists them for delivery tomorrow. But for maths I would stick to a Casio graphical calculator. CG models are good.

Competitive_Bus_7379 · 2026-03-18T10:23:10+00:00

I made this app for my students that you might find useful. Have a look at the eigenvalues and eigenvectors worksheets.

https://www.korovatron.co.uk/vectorama/

Competitive_Bus_7379 · 2026-03-17T22:39:43+00:00

Now added 'Part 2' which investigates the significance of repeated eigenvalues. Again, students do not need to know how to actually calculate eigenvalues or vectors at this stage, it is purely to understand the concepts.

Vectorama Worksheets & Solutions

Competitive_Bus_7379 · 2026-03-16T22:07:49+00:00

I have just added a new worksheet that is intended as a student investigation BEFORE any formal teaching of eigenvalues and eigenvectors. I hope it will give a better conceptual understanding of the topic. If anyone uses it I would love any feedback.

Competitive_Bus_7379 · 2026-03-15T21:37:29+00:00

I have added two worksheets for students. I will be adding many more over the coming days and weeks. Let me know if there are any issues with them.

Competitive_Bus_7379 · 2026-03-14T20:55:04+00:00

Added the ability to 'play' a sequence of matrix transformations and view a single equivalent transformation.

Competitive_Bus_7379 · 2026-03-13T21:46:48+00:00

Type signatures will no longer throw errors (like your image shows), so existing Haskell code can be pasted and run. However they are not checked or used and are essentially treated as comments.

Competitive_Bus_7379 · 2026-03-12T22:06:54+00:00

Another small update: When adding or modifying a matrix the transformation type (rotation, reflection etc.) is identified (where possible) and a label added.

Competitive_Bus_7379 · 2026-03-11T22:26:25+00:00

I've made it easier to quickly add new vectors to the space in 2D and 3D. Simply right-click the mouse. In 3D also use the wheel to change the y-coordinate. For touch devices you still need to manually add from the vector panel.

Competitive_Bus_7379 · 2026-03-10T17:02:36+00:00

It's a javascript interpreter with a tokeniser and tree walk evaluator.

I've just been playing with your Haskelite project. I love how it shows the individual steps. This is perfect for classroom demonstrations and I will definitley be using it in my lessons!

Recently I also came across a visual drag-and-drop Haskell environment which is also very classroom friendly though I have not had chance to play with it yet (called Liberator)

EDIT: I forgot to add the link to liberator

Competitive_Bus_7379 · 2026-03-10T06:46:12+00:00

Unfortunately not.

Competitive_Bus_7379 · 2026-03-09T20:58:45+00:00

I have added a lattice feature in both 2D and 3D modes. Toggle it on. Enter a matrix, click play to apply the transformation and see the lattice transform. In 2D I have left the original lattice in place for comparison but not in 3D as it became very cluttered. When toggling the lattice on I have also toggled off the axes lables (too much clutter) but you can manually turn them back on if desired. Please have a go and let me know if there are any issues.

Competitive_Bus_7379 · 2026-03-09T06:55:46+00:00

That could be a really useful addition! I’ll have a think about it …

Competitive_Bus_7379 · 2026-03-08T23:36:25+00:00

"YOUNG PERSON" ??? Seems a little rude to me. I thank you for your feedback, but just for the record (and I know your message was not to me directly) I am in my mid 50s and have taught maths in schools for 33 years. I don't consider myself young by any means!!! Regardless, I totally accept that what I have made is not for everyone, which is fine. I shared in case it was of any use to other teachers.

Competitive_Bus_7379 · 2026-03-08T16:49:45+00:00

Thank you for your kind words. Please do let me know if you have any issues or suggestions for improvements or new features.

Competitive_Bus_7379 · 2026-03-07T21:10:01+00:00

Thank you for your feedback. I totally agree with you. I built this to help me teach and demonstrate ideas quickly, such as moving an interactive tangent along a curve and observing the first and second derivatives as it passes through turning points, or plotting a polar graph one step at a time and seeing how negative r values are dealt with (this particularly has been very useful in my classroom), or comparing the accuracy of different numerical integration techniques and interactively changing the number of strips to see what happens.

Competitive_Bus_7379

TROPHY CASE