HTML5 client-side graphing calculator | Hacker News Reader

HTML5 client-side graphing calculator

graph.tk

56 pointsanigbrowl17 comments

I can't tell if aantthony (the github handle of the creator) posted this. aantthony, are you here? Folks might want to ask you some questions.

Hello, I'm here now :)

I didn't post this, so thanks for posting it anigbrowl.

Hey! My question is: Where did this come from? An academic project? And, what are your goals? Writing a CAS system in JS could be a gargantuan undertaking!

Not an academic project, but the idea came out of thinking of what I could do with the canvas element. Originally a CAS was a joke :)

Goals - when it's finished I'm hoping for the following features: - Showing points for intercepts, maxima, and minima. - Calculating derivatives and integrals. - Plotting inequalities and implicit equations. - Solving differential equations (it would be great if it was with CAS, but that would be very difficult)

Other ideas include: - Plotting in 3D - Visualisation of discrete data - maybe.

I think it will be useful for places like schools where it's difficult to install software.

Thanks for asking.

I like the school idea. Maybe you can ping Khan (academy), for his interactive portion. I'm still fuzzy on the integrals and derivatives: are they for a predetermined set of functions?

Do HTML5 applications play havoc on anybody else's browser? I'm running Firefox 3.6.13 on Ubuntu 10.04.

Try Chromium. I think Firefox 3's JavaScript speed is too slow for intensive applications like this. The FF4 betas are probably much faster, but if you want to see this in a stable browser it should work fine in Chromium.

Works fine for me on Chrome latest dev channel and Safari 5.0.2 on Mac. That said, I've had issues with Firefox 3.6.x with HTML5 in the past, ranging from outright incompatibility to extremely slow performance. Firefox 4.x supposedly fixes all those issues. YMMV.

For most HTML5-specific stuff you generally need Firefox 4 (or the latest Chrome). I'm running Beta 9 and this works great there.

http://news.ycombinator.com/item?id=2110106

Oops - sorry.

It is pretty good, but I think infinity resolves at some crazy small number. I entered in 999 in place of inf and it resembled the function I remembered from university much more clearly. Cool app though.

This is one is good too and in 3d

http://www.graphycalc.com/

get a better domain name - besides that... great job!

I like the domain name. It's short and catchy.

The .tk domain has been ruined so much that it just screams untrustworthy.

Thanks. I think I'll have to change it. The domain's blacklisted on facebook lol.

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