Mathematica

FDTD Code or Example? (2D wave eqn, rect grid, coords x,y,t)
On Jul 22, 11:40 am, "Kevin J. McCann" <Kevin.McC...(a)umbc.edu> wrote: I have written a little bit, but it is just some simple propagation stuff, no dielectric blocks etc. Most of the stuff out there is written in that other M-language. Try a Google on toyfdtd - if you haven't seen this already. Kevin ... 24 Jul 2010 05:52

Accepting string input with quotes in Manipulate
I am writing a simple application where I'd like the user to be able to inp= ut a regular expression that will be used to filter data. I'd like the Inpu= tField to accept the string without requiring double quotes. The following = code works, but requires the quotes: Manipulate[ StringMatchQ[ "take the money... 23 Jul 2010 08:04

A question on plot3D
Good day Group, Is there a way to remove frame from a 3D plot in mathematica? I am writing a Journal paper in which I have about 8 3D plots from mathematica and they seem to be taking so much space. Any help on ways to make mathematica's 3D plot consume less space will be appreciated. Thanks you all in advance... 26 Jul 2010 09:25

Help with an ODE
I would GREATLY appreciate help symbolically solving the following ODE system. DSolve[y''[x] == (1 + y'[x]^2 + a y[x]^4)/y[x], y, x], with y[0] = y[1] = 1 and "a" is a constant that satisfies Integrate[R[x]^2, {x, 0, 1}] = 1/(10*a); I can't quite pull it off with my current Mathematica skill level. ... 27 Jul 2010 05:09

calling mathematica functions from c++
How can I use mathematica functions from c++?? for example, I want to write a program in c++ which uses the Integrate[] function. ... 23 Jul 2010 08:04

Saving files from the web
I want to save some files from the web to the disk. I already generated the list of strings with the urls of the files I want to get, urlList, and I want them to keep the same names under the directory stored in the variable "dir". But my difficulty is in getting a file from the web and saving it to disk without Ma... 27 Jul 2010 05:09

Mathematica developer
Company: 1010data (more info: www.1010data.com) Type: Full-time Experience: Mid-Senior level Functions: Information Technology Industries: Computer Software Location: Greater New York City Area Job Description: We are pushing the envelope of Wolfram Mathematica as an application develo... 23 Jul 2010 08:04

problem with sovlign aquation with argument x/w
How can i solve equation of type -d^2/dx^2\psi(x/2)=1/4psi(x/2), the problem is i cant use x/2 as an argument. Please help. ... 23 Jul 2010 08:04

Big Memory Needed Again
Dear Mathematica Gurus, If sombody have memory bigger as 8MB try to help me solve equation (don't try with smallest memory). Also if will be out of memory inform me how much memory do you use. Solve[1/2 Sqrt[ 3] ((-1 - 3 p + 2 z2 + 2 z Sqrt[-1 + z2])/( 2 (-z + Sqrt[-1 + z2]))) z + 1/2 Sqrt[ 1 - ((-... 23 Jul 2010 08:04

Inverse of a six-parameter asymmetric sigmoidal curve
Hi everybody, does anybody have a clue how to get Mathematica to deliver the inverse of the following function? fct := c + (k * Log[x]) + (d - c)/(1 + Exp[b*(Log[x] - Log[e])])^f Solve[fct == y, x] Solve::tdep: The equations appear to involve the variables to be solved for in an essentially non-algebraic way.... 24 Jul 2010 05:52