Functions 2d

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Benjamin Joffe 作

V1.2 2006/06/04 10:07:34

Draw 2D curves from mathematical expressions

Enter a mathematical function and have it plotted on a 2D plane.

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Equations are entered as a function of x. An example for a unit circle would be:

f(x) = (1-x^2)^(1/2)

For a full list of the functions, operators, variables and constants available in this widget visit <a href="http://functions2d.abrahamjoffe.com.au/v0.1.html" target="_blank">http://functions2d.abrahamjoffe.com.au/v0.1.html

There is one main feature that is missing from this release and that is that the axis do not have markings on them. This is due to the limitation of Canvas not being able to write text, however in a later release I will have my own text implementation.

Enjoy!

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You could take some ideas from the great Graphmatica by kSoft, at http://www.graphmatica.com

発言者 YinYanger, # 2006/06/16 19:17:23

good start....but needs to be improved a lot

発言者 basti2015, # 2006/06/11 15:28:00

Very cool and useful widget for students. I enjoy it!

発言者 vinczej, # 2006/06/10 22:48:23

This widget looks like it would be great for my school work. cheers

発言者 benbrady, # 2006/06/10 14:48:07

This widget is great for doing my assignments...hope you do more

発言者 kikomach, # 2006/06/10 7:28:09

That's the first widget I found that I think is actually useful to me

Great work, but text would really be great

発言者 wrtlprnft, # 2006/06/10 5:19:00

"True, all of my widgets so far work just the same without an internet connection. I haven't had any real great ideas that I have wanted to pursue that would take advantage of that.
If you think of something good then tell me!"

How about a Jabber IM widget? By the way, this widget is great for kids. You're a genius!

発言者 coreymwamba, # 2006/06/07 9:42:08

That's really wonderful!

発言者 fantast_xue, # 2006/06/06 11:55:50

...I just hope that fewer developers feel restricted by that paradigm

Amen to that

発言者 yadavankur, # 2006/06/06 10:40:28

True, all of my widgets so far work just the same without an internet connection. I haven't had any real great ideas that I have wanted to pursue that would take advantage of that.
If you think of something good then tell me!

発言者 Benjamin Joffe, # 2006/06/06 8:21:32

Benjamin you're a real Javascript guru! That's a wonderful bulk of code., But I notice that your widgets are all Internet irrelevant, why ignore the best part of Javascript? I don't think force Javascript to do Java, C\C++'s work is a good direction, even if you can change Microsoft Office into a widget.

発言者 wangjiaji, # 2006/06/06 5:15:26

I wrote the file called "parse.js" about a month ago for another math program I was developing so it was handy that I could use it here as well. That file took probably a good 4 hours and is mainly in place to stop people from crashing the program by inserting bad codes, and to allow the ^ sign as that is not native to JavaScript. The bulk of the program I wrote in two sittings on the weekend that probably occupied about 8 hours of my time.

Whether or not you consider a program like this suitable for widgets is entirely your opintion and that's fine, I just hope that fewer developers feel restricted by that paradigm.

発言者 Benjamin Joffe, # 2006/06/06 4:11:54

I'm not so sure - if you can use widgets as a cross-platform development tool, much like Java, why not? I agree that I'm not sure I'd need it available all the time, but it might be handy to have.

Of of interest, how long did it take to develop something this complex, from start to finish?

発言者 johnnysaucepn, # 2006/06/06 2:12:54

Wow, great widget but this is more of a proof of concept sort of widget. I mean it proves that a lot can be done using widgets (and canvas etc) but I am not sure if this is what widgets are supposed to be for. Widgets are supposed to be utilities and can not compete with programs. I am not sure why I would use this for a quick reference or something. The png export feature is great though. Seriously, I love the widget and rated it 5 star, and if I had kids I could teach them something using this since it is easy to use, but I am not going to use it. Another thing, this widget also proves you are a good programmer+designer.

発言者 yadavankur, # 2006/06/06 0:35:37

Nice widget, good if you like a quick plot of function without having to open some full-fledged math program.

One thing I'd like is the ability to zoom x and y separately.

発言者 garmt, # 2006/06/05 17:32:50