Rasmus Anthin《Multivariable Calculus Toolbox 》(多变量微积分工具箱)

dynamic

This is a toolbox for making it easier to visualize vector and scalar functions of three variables. Mostly all of the elementary functions are overloaded. Such as the plot-function. Important to note is that one cannot yet solve any PDE's using this toolbox.

There are plans on interfacing these toolboxes with each other. With this package, one can perform following calculations among others:  

Laplacian  
Divergence  
Curl  
Gradient  
Integration  
Differentiation  
...  

This toolbox contains two classes for the moment: "scalar" and "vector". A scalar object is a function of three variables in either Cartesian (x,y,z), spherical R,theta,phi) or cylindrical (r,phi,z) coordinates.  
The constructor can be used in many different ways. It is advisable to first run "vecinit" in order to create some easy to use variables (type "help vecinit" for more info).  

If you have typed "vecinit cart" then you can use the three variable objects x,y and z to create new objects lik this:  

» f=sin(x+y)-z*y^2  

     Scalar function:  
     f(x,y,z) = sin(x+y)-z*y^2  

Vector objects are 3D-vector functions of three variables, ie three dimensional fields:  

» H=[-y x 0]  

will produce a "magnetic field" which can easily be plotted  
by typing:  

» H=setrange(H,[-2 2],[-1 1],[-1 1 2]);  
» plot(H([],[],0))  
» axis equal  

This was a few samples of what you can establish with this toolbox. It is designed so that it should be so simple to use as possible. The classes saves both memory and time for you. Also your variable space will not be as filled with variables as it was before.

congzhen

这么好的帖子，顶一下

wamv

顶~~~~~~~~~~~~~~~~~~

peppeiaiwo

这么好的帖子，顶一下

xjbob

好贵的啊，还要钱的啊

huangbinbin

谢谢啦~~lz好强大！不过好像要钱的说。。。。。。。。。。。

hukaiye

这么好的帖子，顶一下

lkt1106

本是属于学术交流，结果却加上限制很是不便

huazhimumu

很有用的东西啊~顶一下！谢谢LZ了哈！下下来看看！

xbc303160308

微分工具箱啊
谢谢咯