# All Questions

628 views

### Google Code Jam: Mountain View code review

After participating in Google Code Jam 2012 Round 2, it occurred to me that the Mountain View problem boiled down to solving a set of linear inequalities, which could be done in Mathematica. I've only ...
262 views

### Selective inclusion of elements in BarChart Legend

Further to my previous question, is there a concise way - amenable to automated setting in a package so that it can be accessed globally - to eliminate some legend item that would otherwise show? For ...
248 views

### SetOptions or other approach to imposing default styling of text in a BarChart Legend?

Gustavo Delfino's answer to an earlier question showed that it is possible to use the third argument to Placed to format text in a ...
891 views

### Nesting multiple functions of multiple variables

I was wondering how one would go about nesting multiple functions of, say, two variables. The problem comes from trying to implement the Chirikov standard map without using "for" cycles. I found a ...
1k views

### How to execute a function in the package from java?

I use Wolfram Workbench 2.0. I can get a KernelLink object and evaluate some simple expressions like "2+2". But I don't know how to export a package and execute ...
508 views

### How to take part (and then sum over) of specific level of an array?

Specifically, I want to take some elements of the lowest level of an array, and then sum over these elements while holding the higher level. Sorry for my vague expression, maybe an example would make ...
664 views

### How to solve a quadratic integer programming problem?

I want to solve a quadratic integer programming problem in Mathematica. My first attempt looks like this: ...
500 views

### Image of input and output cells is not exported correctly

Wolfram Blog uses PNG images to display input and output cells in a notebook. For example, the following is an image from Samuel Chen's post: I should be able to produce a similar image by ...
659 views

### Displaying a series obtained by evaluating a Taylor series

Description of problem I would like to use Mathematica to display the series obtained by substituting a value for $x$ in a Taylor series expansion. The terms of the series will be rational numbers, ...
1k views

### How to construct a treemap using non-rectangles?

I've written the standard version of a tree map (a graphic that shows nested data) and I'm looking to improve on this layout by switching to different types of polygons or perhaps circles. Can anyone ...
654 views

### How can one define an infix operator with an arbitrary unicode character?

You can setup "UsefulFunction[a, b]" to use custom infix notation "a [LeftRightArrow] b" as follows: ...
272 views

### How do I reorder vertices in a graph?

I have a directed acyclic graph $g$, and I'd like to re-order the vertices in this graph object such that when I call VertexList[myGraph] the vertices appear in ...
187 views

### Issue with PathGraph

I am having a strange issue with PathGraph. Executing PathGraph[{a, b, c}] or ...
149 views

### How to estimate time series from a plot? [duplicate]

Possible Duplicate: Recovering data points from an image Suppose you have a colored plot of several time series (say, from a paper), but not the raw data. How would you estimate the series, ...
444 views

### Does Set vs. SetDelayed have any effect after the definition was done?

I was always assuming that the only difference between Set (=) and SetDelayed (...
185 views

### Graphics, PlotRange and/or PlotRegion

Consider the following snippet of code: ...
615 views

### Prefix operator with low precedence

The question is simple, but I will elaborate on the background as well for those interested in the idea: How to define a new operator with specified precedence value? Background Mathematica was ...
107 views

### Strange Tilt on error notification

I was testing the source code of the answers to this question. And when I tried this response and maxed out most of the manipulators, this is what I got. What went wrong that the errors are ...
117 views

### NIntegrate failling on floating value

I'm trying to take the following integral NIntegrate[ ((Sin[Q 1]-Q 1*Cos[Q 1])/(Q 1)^3)^2 * S[Q,0.4,2] * Q BesselJ[0,0.5Q] , {Q,0,Infinity}] ...
3k views

### Finding long strings of identical digits in transcendental numbers

Introduction Describing the three main streams of present-day mathematical philosophy (formalism, Platonism and intuitionism) in a well-known book, The Emperor's New Mind, R. Penrose says: ...it ...
633 views

### Bayesian Inference with Continuous prior distribution

Assume that we have a prior distribution for the probability of success as follows. p = BetaDistribution[6, 14] which we can graph as this ...
342 views

### What is the simplest way to set the toolbar of a notebook to an image?

For custom stylesheets, it's nice to have a graphic banner in the Docked Cell. According to the doc page tutorial/IntroductionToToolbars, this is how you do it, but it seem a bit overkill: ...
487 views

### Problems with txt-export under Macintosh

I exported data form Mathematica to txt-format on my Mac. When opening the txt-file on a Windows-System the file does not appear as on my Mac (see screenshots). Code: ...
718 views

### What is the fastest way to find an integer-valued row echelon form for a matrix with integer entries?

Let me begin by saying that this is my first post on StackExchange. I apologize in advance if I unwittingly break any of its unwritten rules of etiquette. Recently, I've been trying to understand an ...
196 views

### DistributeDefinitions not working for compiled functions

This is fixed in Mathematica 9.0.0. I'm having trouble with parallel evaluation of compiled functions. Here is a simple example illustrating the problem: ...
262 views

### I need to move all the variables(x,y,z) to one side of an equality for the equation of a plane

I have 5(x-1)-(y+1)-(z+1)==0. If I use FullSimplify on it it returns 5x==7+x+y. This is not ...
866 views

### Combining plots (almost there!) [duplicate]

Possible Duplicate: 1 Plot, 2 Scale/Axis I aim to combine two plots in which the YY axes have different scales: one goes PlotRange->{0,100} while the ...
783 views

### Mathematica Library Link : How to use non standard 'mint' e.g. 'unsigned int' or 'long long int'

I use Mathematica 8.0.4 on Mac OSX 64 bit, and gcc as C compiler. I am trying to write a LibraryLink function that deals with large positive integers i.e. greater than $2^{31}-1$. By dealing with, I ...
149 views

### Vertices, their labels, and how to refer to them?

In the examples I have seen, graph vertices in Mathematica are usually explicit small integers. However, Wolfram documentation says that vertices can be any arbitrary expression (eg., george, x^2, ...
261 views

### ShearingTransform and Dynamic

Background: I have a geometric transformation composed of a RotationTransform, ScalingTransform and ...
4k views

### Why can't Mathematica “Solve” my equation?

I am trying to get Mathematica to solve the following equality in terms of $w_i$ \$\displaystyle \frac{\sum_{i = 1}^{n} x_i }{\sum_{i = 1}^{n} y_i} = \frac{\sum_{i = 1}^{n} ( (\frac{x_i}{y_i}) w_i ) ...
1k views

### How can I replace bi-directional DirectedEdge pairs in a Graph with a single UndirectedEdge?

The Cayley graphs produced by Mathematica 8.0's CayleyGraph function represent actions that are their own inverses in an unconventional way: rather than using a ...
372 views

### Retrieving duplicates from nested list

Consider the following: data={{1,a},{10,a},{5,b},{4,c}}; In my case duplicates are defined when for {x1,y1} and ...
2k views

### Creating a plot without an x-axis and automatic ticks for the y-axis

I am trying to plot a function with specific options for the appearance of the plot. I want the X axis to not show up, and the Y axis to be labeled normally (i.e. numbers outside the plot).. Yet, I ...
499 views

### Select a directed SubGraph without sinks and sources

Consider the following problem: Assume you have a large list of directed edges, that constitute a large graph. I would like to provide an initial subset of vertices and I need to know which additional ...
215 views

### Automatically use InputOnly style

Some of the built-in Stylesheets (e.g. PastelColor) connect together input and output cells by setting the CellFrame and ...
434 views

### Copying Greek text from notebooks as unicode [duplicate]

Possible Duplicate: How to “Copy as Unicode” from a Notebook? How can I copy Greek text from notebooks as proper Unicode that can be pasted into other applications? If I type ...
322 views

### How to format dynamic InputField value using NumberForm?

Background: I want all numbers in InputField's displayed as NumberForm[num,2]; Now, consider the following the snippet of ...
3k views

### How to show solid bodies using volumetric rendering?

Note: This question was asked when Mathematica 8 was latest release. Version 9 has built-in support for volume rendering through Image3D. There's an example on ...
1k views

### Construct 3D image from multiple 2D images

My goal: How to (1) construct 3D image for visualization. (2) how to write 3D array or image into binary raw file. Is there a way to accomplish this in Mathematica? Alternative_Answer for: ...
1k views

### How to create blurred Graphics3D objects?

Initially I was interested in renderring a 3D analog of a blurred disk like this ...
93 views

### PaneSelector and options in a Module

Consider the following snippet of code: ...
6k views

### ShowLegend values

How do I get ShowLegend to put the max and min values that a plot produces. for example, when using ListDensityPlot, with ...
233 views

### How to add an entirely new menu

Is it possible to add an entirely new menu, say menu "CustomApp" on the fly? For example a CustomApp package could add its own menu "CustomApp" with submenus, ect, once Needed. Former examples I ...
170 views

### Can styles be exported in EPS as simple text tags for use by LaTeX's psfrag?

Is there a way to export graphics as EPS so that LaTeX can perform style substitutions or modifications on them? I know that it is possible to replace simple text elements in imported EPS files using ...
561 views

### Best way to add KeyEvents and faster Quit

Many users have asked how to add KeyEvents to speed/improve keyboard input. This is just a random example. The technique is always the same. It requires that you ...
353 views

### Ulam's Spiral with Opperman's diagonals (quarter-squares)

First we craft a function to return the quadrant boundary based on Oppermann's Conjecture a[n_] := (Mod[n, 2] + n^2 + 2 n)/4 Then we create a few lists ...
2k views

### How to solve an overdetermined system in Mathematica

I would like to understand the reasons and find a way to avoid such behaviour of the Solve function in Mathematica 8. ...