# All Questions

1answer
185 views

### How to solve this equation? [closed]

The numbers real x and y, are solutions of the following equation system : $$\{x^3 + 3x^2y + 3xy^2 + y^3 2\sqrt2$$ $$\{x^3 - 3x^2 + 3xy^2 -2y^3=0$$ . $$x^2 + y^2$$ How to solve it ?
1answer
592 views

1answer
232 views

### How to get state of checkbox?

Please explain how to get state of checkbox for its usage in further calculations. And I want to keep the selection from session to session without external savings. Thanks in advance
0answers
195 views

### How to style and position VerticalCallouts and RadialCallouts

Here is a pie chart with a labels placed with a "VerticalCallout" ...
2answers
453 views

### Calculating morphometric properties

Is it possible to calculate segment length, segment diameter and branch angles for three dimensional geometry. Geometry contains vertex points and polygon surfaces as ...
3answers
325 views

### Argmax in a List

I have a sequence of 100 lists. A sample list, list[1], looks like this: ...
2answers
553 views

### How to measure segment length and branch angle

I am trying to measure segment length and branch angle or bifurcation angle between each pair of segments. My image after thinning looks like this: ...
2answers
165 views

### How to display docked cell (defined in stylesheet) in *.nb only (and not in *.cdf)?

I have a docked cell in a stylesheet (with shortcuts for editing the notebook). Is there an option I can set so that this cell is not displayed in CDF? Edit Based on answer by @MikeHoneychurch and ...
1answer
515 views

### Use Mathematica to do a network analysis of Mathematica.SE

Recently Wolfram|Alpha announced that you could use it to analyze your Facebook site. How could I do a network analysis of questioners and answers here on Mathematica.SE?
1answer
789 views

### Calculus 1: Create the plot of a function satisfying certain conditions

Today in class we were shown how to create an infinite limit graph (plot) given the preceding conditions. While I have a fairly terrible sketch of this graph in my notebook, I'd like to create a clean ...
1answer
158 views

### Using Plot3D with one variable dependent on the other

Plot3D[f,{x,xmin,xmax},{y,ymin,ymax}] In the above , is there any way to give range of y in terms of x. I want to give like ...
1answer
154 views

### How do I fix Needs[“OpenCLLink”] failure?

In Mathematica 8.0.4 under Mac OS X 10.8.2, when I evaluate Needs["OpenCLLink"] I get error ...
1answer
312 views

### (N)Solve does not solve equation

I am trying to calculate where a beam hits a mirror. The mirror is described by this curve (two facing spherical mirrors): ...
2answers
227 views

### How to insert an expression in a Mathematica program?

I need to insert a very large expression in a Mathematica program. So I first Put[large expression,"file"] and then use Block[{}, Get["file"];...] to ...
4answers
289 views

### permutation as product of transpositions

How can the permutation that takes{-f, -i, i, -e} into {-e, -i, i, -f} be realised as a sequence of nearest neighbour ...
2answers
105 views

### Subvalue and level

I'm interested in the arguments of f in expressions like f[a]@f[b]@f[c] By argument I mean what is here ...
1answer
316 views

### Solving antisymmetric tensorial equation

Assume we have the following Tensor objects: $$F_{i}{}^{j}\;and\;S_{ij}{}^{k},$$ where the components of $F$ are known, and we would like to solve for the components of $S$ ...
1answer
141 views

### How could I obtain real numbers for the following integration instead of imaginary ones?

As shown in the following codes, ...
3answers
391 views

### How can I regroup elements in a list into a tree based on their values?

I have a list of elements in an outline, here is an example that is only 3 levels deep: ...
0answers
111 views

### Why does mathematica crash when I rotate a 3D graph? [duplicate]

Possible Duplicate: SIGSEGV error with 3D Plots I just recently installed mathematica 8 on my linux machine, running ubuntu 11.10 I decided to tun and test mathematica so while the terminal ...
1answer
554 views

### Is there a simple example using OpenCLLink that shows performance advantages?

OpenCLLink allows Mathematica to use the OpenCL parallel computing language. I have done some tests on simple examples, but so far, the CPU regularly outperforms ...
0answers
176 views

### how do you fix an axis in place for a movie? [closed]

I have a series of txyz coordinates, which I am plotting in space to create a movie of the objects' time evolution. With something along the lines of (simplified): ...
2answers
174 views

### How do I convert an argument list to a list of arguments? [closed]

I think this is a basic question, but I am having difficulty finding the answer in the documentation. Thread is not what I am looking for, I think. Suppose that I ...
1answer
242 views

### Can palettes dock to notebooks?

Over on Meta: A wishlist for Mathematica I got an interesting comment on the following suggestion and thought it merited a stand alone question: re: NOTEBOOK INTERFACE USABILITY & ...
1answer
102 views

### Changing the contents of a TextCell according to the user input of another TextCell

Is it possible to change TextCells in the following code in that way, that the TextCell "profile starts at x =" changes to "profile starts at y =" and at the same time the TextCell "measurement starts ...
1answer
282 views

### ReplaceAll[] and Limit[] don't give correct results for this expression under extreme variables [duplicate]

Possible Duplicate: Funny behaviour when plotting a polynomial of high degree and large coefficients 1/x^2 + (3 + x)/(6 (1 - Exp[x] + x)) ——This is a ...
3answers
187 views

### How to find maximum ConditionalExpression among all solutions

For example I want to find solution with maximum value among solutions (and possibly plot it): ...
6answers
1k views

### How do I fill in a circle made by ParametricPlot with one solid color?

I have a very simple question but I am new with Mathematica. I made a circle on a parametric plot and I made the line black. I want to make the inside of the circle on the parametric plot red. So the ...
1answer
519 views

### Are there any openCL test suites?

I have a new ATI gpu that I have been trying on 3 different distributed computing projects. I get errors on each work unit. The errors indicate No Protocol which could be caused by a bad environment ...
2answers
232 views

### Solve for $a$ as a function of $\beta$?

I am trying to solve this equation: $$\beta^{-a} \Gamma(a) \sin(a \pi) + e^\beta \beta^{2 a - 1} \Gamma(1 - a) \sin(a \pi) = 0$$ I tried the following: ...
1answer
417 views

### Monospaced fonts are not monospaced

I'm using Linux-x86-64 as operating system. Can someone explain this behaviour and maybe give a hint how to resolve it? Here are two lines of exact the same number of letters of a monospaced font: ...
4answers
148 views

### Is there a good way to map a function over a list to lists exclusively of a certain depth?

Let's say I have some ragged list. If some elements have some depth $n$, then is there a way I can map a function to only those elements? I.e., for some list foo, ...
2answers
263 views

### Conditionally replace rows in lists

I have a sequence of matrices/lists ...
2answers
310 views

### Using Functions as Arguments to Function

I am trying to make a function like Norm but defined like so: MyNorm[{x_,y_,z_}]=Sqrt[x^2+y^2+z^2]. Mathematica assumes that x, ...
1answer
148 views

### How can I find the average of the ordinate of an indefinite number of lists of points?

Suppose that I have three lists: list1 = {{0, 1}, {0.1, 10}, {0.2, 100}}; list2 = {{0, 1}, {0.1, 10}, {0.2, 100}}; list3 = {{0, 2}, {0.1, 20}, {0.2, 200}}; In ...
2answers
164 views

### How can I set the tick marks of the x axis in RectangleChart?

By default, the x-axis in RectangleChart is not labeled. Using Axis -> {True, True} does not help. Can I set the ticks ...
2answers
846 views

### Set default font for Output

Is it possible to set the font family to Arial for axes, legends and labels globally? I found out about ...
2answers
168 views

### DateList Segmentation of data

I've been trying to separate large segments of DateList formatted data (years worth at a time) into individual days using the Split function. The data has the form: ...
0answers
528 views

### Fast Spherical Harmonics radiative transfer

This is a rather specific question and I apologize for spamming you with some lengthy code. But it could be interesting for some reader and maybe you can help out, so please bear with me. I am using ...

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