Mathematica

NMinimize method in NonlinearModelFit not accepted!
I cannot set Method->"NMinimize" inside NonlinearModelFit in Mathematica 7 Mac. I get the following error message: NonlinearModelFit::bdmtd : Value of option Method -> NMinimize is not Automatic, "Gradient",...,"NMinimize", or "LevenbergMarquardt" which clearly does not make sense. Everything works fine ... 23 Mar 2010 05:37

Axeslabel containing capital n
Hi In my plot I need to label my y-axis N, but Mathematica recognizes this as numerical value. How do I turn this off while plotting, so I can label my axis N? Also, I need to change the font of the N. But I guess that is easy as long as the above problem is taken care of (i.e. just use Style)? Best, Jim. ... 18 Mar 2010 05:56

Styling print output
Hi, I'm relatively new to Mathematica, so I'm not sure if there's a better place for this particular question or if it has already been documented. I've searched the Mathematica documentation center for an answer but AFAIK the documentation about Stylesheets is incredibly terse if it exists at all. It seems l... 18 Mar 2010 05:56

Algebraic reduction
Dear Mathematica Gurus. Who know how force simplification of polynomials (x^n - 1)/(x - 1)] by Mathematica Table[FullSimplify[(x^n - 1)/(x - 1)], {n, 1, 10}] Above eliminate denominator only in first 5 n Any idea ? Best wishes Artur ... 17 Mar 2010 05:45

Findroot
Hi all, I'm trying to use the result of non-linear equation solved using Findroot order. The result of the solution is given as {a---> 0.5321}, say. I want to use this result and to let some variable like b to equal it, in other words I want to let b=0.5321 in order to use this value of b in other calculations. ... 16 Mar 2010 07:56

How to extract the x-axis and y-axis current ticks of a plot from AbsoluteOptions?
Version 7: Many times I find I need to change the Plot Ticks (mostly to make the ticks display in units of Pi for example instead of just in pure real numbers). The only way I know how to do this now is this: I build my own Ticks lists, and then do Plot[...,Ticks->{myXticks,myYTicks},....] But the prob... 17 Mar 2010 06:52

Calling kernel.dll from Mathematica
Hello, There are nice examples in the Documentstion on calling simple functions defined in the Windows's kernel.dll from Mathematica. For example, it is easy to call GetTickCount function: Needs["NETLink`"] getTickCount = DefineDLLFunction["GetTickCount", "kernel32.dll", "int", {}] But I have not found any ... 1 Apr 2010 07:53

Automatically identifying a directory
When using notebooks I can use NotebookDirectory[] to return a string for the notebook path. Unless I've missed something obvious there doesn't appear to be a way of automatically finding directories if you are running *.m files remotely from a terminal. Basically I have an *.m file and I'd like to have something l... 17 Mar 2010 05:45

Generating Valid examples for a list of Functions
Hi all, How can I programmatically generate a set of valid examples from the Documentation Center for a small list of Function names I am interested in? Select[Names["*"], (Length[Quiet[Options[ToExpression@#, Method]]] == 1) &, 10] {"Accumulate", "ActionMenu", "AlgebraicRules", "ArrayPlot", "BarChart"... 15 Mar 2010 06:47

Equating real and imaginary part
Please help with the commands for equating real and imaginary part of the following expression. I have tried a lot, Please help me : -(I (2 Sqrt[1 + Tanh[z]^2] - 16 Csch[z] Sech[z] Sqrt[1 + Tanh[z]^2] + 16 Sech[z]^2 Tanh[z] Sqrt[1 + Tanh[z]^2] + 9 Tanh[z]^2 Sqrt[1 + Tanh[z]^2] + 24 Se... 15 Mar 2010 01:21