Mathematica

Manipulate with variable number of controls
Hi, Can I set up a Manipulate with a variable number of controls? The code below draws 4 circles and line segments between them at the angles given by the slider values. As you can see, I had to hard-code the function for the lines, and the number of controls given by the size of rtable. Is is possible to... 4 Mar 2010 05:34

Functions
I want to define f[x_]=a x^2 and after g[a_,f_]= 2a+f so g is an "a" "x" function and where "f" is the previous function. Giving to g a value for "a" and "x", I'd get a correct "g" result. Which is it the correct listed? ... 26 Feb 2010 05:14

minimize's constraint
hi i have an objective function with constraints as below (c0^2+c1^2+c2^2)(0.0765)+0.0916(c0*c1)-0.0916(c1*c2)-0.021(c0*c2) subject to (c0^2+c1^2+c2^c3)=1 i don't how to solve it using minimize because it contain '=' constraint. can anybody tell me how to solve it Thankyou ... 25 Feb 2010 20:29

Installing Mathematica 7 in Linux (ferora 12 x86_64)
Hello Guys, I updated to fedora12 from defora6... I reinstall mathematica, during the installation when asked to modify SELinux I said 'yes'. But after the installation SELinux doesn't let me to run mathamatica. I got theses messages: * SELinux preventing /usr/bin/gdb "write" access on gdb * SELinux preven... 25 Feb 2010 02:36

SELinux not letting run Mathematica 7
hello guy, I just updated to fedora 12 x86_64. and reinstalled mathematica and say 'yes' when aske to modifie SElinux, when I click the icon it is not letting open mathematica recieving this message: * SELinux is preventing /usr/bin/gdb "write" access on gdb * SELinux is preventing /usr/local/Wolfram/Ma... 25 Feb 2010 20:29

How do I enter this partial differential equation?
I have been trying to enter the PDE you can see in the picture at: http://i50.tinypic.com/2rqmx4g.jpg but I have had absolutely 0 luck. I am trying to solve the eqn into the form: f(r) = C (aka, solve it for C). Can anyone help me? ... 25 Feb 2010 08:01

Typsetting
Mathematica 6, xpwindows Grid[{{PDF[NormalDistribution[\[Mu], \[Sigma]], x], ",", "-\[Infinity]<x<\[Infinity]"}}, ItemStyle -> Directive[FontFamily -> "Tahoma", FontSize -> 28, Bold]] // TraditionalForm The above works, but the quality is poor, and I hope someone can suggest a better way to do... 25 Feb 2010 18:13

interpolation problem with 2dimensional function
i have the following problem: i have two functions: f[Q] and x[Q] and i want f[x]. i cant invert x[Q], so i do this like this: fx=Interpolation[Table[{x[Q],f[Q]},{Q,0,10,0.1}]] this work fine. but now my function depends on 2 variables: f[Q,R] with given x[Q] and y[R]. How can i now interpolate the function f[x,y... 25 Feb 2010 08:01

does it make sense ? Provisio,
Thanks, Daniel. Does it mean that it is worth checking separately all the "unresolved" expressions in a provisio, or it only applies to some special cases (say, Integrals). Best Michael Partenskii On Tue, Feb 23, 2010 at 9:59 AM, Daniel Lichtblau <danl(a)wolfram.com> wrote: michael partensky wrote: S... 25 Feb 2010 02:35

Custom ContourLabels in Contour Plots
I would like to specify custom contour labels in Tooltips for contour plot. ContourLabels has a form {f, g} where f gives an explicit displayed label, and g gives a Tooltip for each complete contour. But I can't make this form work and the Help has no explicit example of this form. Here is an example ... 25 Feb 2010 02:35