Math workpad

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Opera widgets 作

V1.5 2008/11/26 8:37:23

A programmable workpad for mathematics.

This widget lets you evaluate complex mathematical expressions. All results are displayed, and you can use the answer from the previous expression directly. Some other features of this calculator are:
- 2D, 3D and vector graphing.
- Many built-in in functions for trigonometrics, calculus and more.
- Built in mathematical and physical constants.

You can also evaluate javascript in this widget. Not documented in the help right now is how to add custom javascript functions to your math environment. This can be done like this:
js controller.addFunction('f', 'function(x) { return 2*x; }');

Where f is the name of the function.

Update (2008-10-16):
- Ported to mobile.

Update (2008-08-21):
- Added support for ** as power operator in addition to ^ (2**4 == 2^4)
- Added solve function to solve linear and quadratic equations.

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"math is beautiful" my teacher

littlebear91 作 , # 2009/10/30 3:04:45

One minor notice - help should be little bit more user friendly for particular functions. Personally for me it wasn't clear what means " sum(function, a, b) ". What's that? It is not a sum of "f" function values in points "a" and "b", how it would come first to your mind. I understand it now, but i had to puzzle over it for some time and i still do not have even a clue how it works for non-integer arguments. And, BTW, what is a mysterious function "controller"? Again, no help associated ;-)
All after all - that's really great stuff! I like it - it's smart and simple. Many thanks for it!

azeul 作 , # 2009/09/05 12:36:12

Excellent Widget. But I noticed that the vectorgrpah function uses the y coordinate in the -y (downwards) direction (for example: vfield(x,y)=(1,1), vectorgraph(vfield), draws (1,-1) arrows in the graph). It should have only one set of coordinate system (right-handed).

fwu 作 , # 2009/08/08 5:33:51

Ma phone is a nokia 5300

Varunmk 作 , # 2009/07/10 15:47:50

Pls tell me how to incoperate this widget to my opera mini . . I am not able to do so . . Pls help me . Varun

Varunmk 作 , # 2009/07/10 15:46:33

very nice

vladtarko 作 , # 2009/03/13 22:48:32

Amazing widget but it will take me time to master it.

yeeliberto 作 , # 2008/11/30 0:00:00

As a programmer I must say this widget is a beauty! Thanks a lot!

AleksOD 作 , # 2008/11/26 22:21:02

simply amazing, thanx!

jiminikiz 作 , # 2008/11/10 20:35:57

Most useful for me
Thanks,

28sharan 作 , # 2008/10/23 19:13:06

This is an amazing widget!!!
It can do any plot, fast and really clean.
I love it.

josemontero9 作 , # 2008/09/07 4:44:09

Really a nice widget! Keep up the good work.

PawlCrux 作 , # 2008/09/06 8:14:43

Wow, this is nice. +10!

Is there a way to list all user defined variables and functions? And maybe a way to quickly save them all?

Also, possible to have a factorial function or ! operator built in?

tinhoy 作 , # 2008/09/02 19:11:10

Wow, an amazing tool, thanks!

AleksOD 作 , # 2008/09/02 14:00:34

excellent

donatofurlani 作 , # 2008/09/01 13:08:14

friend1250: Unfortunately you can't solve for variables right now. It would be quite hard to implement such a feature in a general sense. You can create a function to solve quadratic and cubic equations using their coefficients though. Maybe such a function should be included.

skyfex 作 , # 2008/08/19 8:27:55

Rulezzz!1

DonCiHot 作 , # 2008/07/27 2:26:09

oh man.. this is cool stuff.. I wish I had something like this visual during my college days...

aboy0110 作 , # 2008/07/24 19:51:50

this is a really nice widget, but i cannot figure out how to solove for variable.
i only need help from such mathematic things when i do quadratic functions with an unkown variable.... mind you, im not into trignomerty and 3d vectors or such.
i just need a little help.
thanks for the amazing widget though

friend1250 作 , # 2008/07/21 17:02:21