All Questions

1
vote
1answer
169 views

Graphics, PlotRange and/or PlotRegion

Consider the following snippet of code: ...
63
votes
8answers
12k views

How to make an inkblot?

How to effectively create a polygon that looks like a realistic inkblot? So far, I could come up with this (borrowing from Ed Pegg Jr.'s Rorschach demonstration): ...
0
votes
1answer
111 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}] ...
10
votes
2answers
466 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 ...
11
votes
1answer
643 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 ...
2
votes
4answers
247 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 ...
2
votes
1answer
427 views

Inconsistent initial and boundary conditions

I have a 4th order nonlinear PDE with the following BCs and IC: ...
3
votes
1answer
799 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 ...
2
votes
3answers
626 views

Problem with Union and Intersection

Consider the following: list={{a,b,c},{c,d,e},{d,e,f},...{x_,y_,z_}}; I would like to apply Union on the elements of the list ...
5
votes
1answer
94 views

Unexpected behavior of PasteButton

Assume the following very complex palette: CreatePalette[ PasteButton[FontColor -> RGBColor[1, 0, 0]] ]; Its purpose is to insert a ...
15
votes
2answers
458 views

Pattern issues weird warning

Take for example head[b_[PatternSequence[_, _]]] := 9 I know this example serves no purpose as is. It also happens in useful examples such as ...
6
votes
1answer
144 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, ...
2
votes
2answers
285 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 ...
4
votes
1answer
3k 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 ) ...
9
votes
2answers
662 views

Avoiding an unresponsive user interface in OS X

I have found that despite Mathematica's numerous updates, each of which have added much functionality, one fundamental issue remains unaddressed: The unresponsiveness of the UI when I make a mistake ...
12
votes
2answers
402 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 ...
7
votes
1answer
175 views

Is it possible to insert a link preceding the Wolfram link at the bottom of html documents?

At the bottom of the html document produced by Mathematica is a link to Wolfram's site. It says: Created by Wolfram Mathematica 8.0 I think it would be nifty to have the option to precede that ...
7
votes
2answers
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 ...
4
votes
2answers
220 views

How to expand all portions of an expression?

Consider a toy expression: expr = Sin[x (a + b)]/(y (z + c)) I would like to expand all parentheses to get something like: ...
11
votes
2answers
259 views

Convert operator to string

How to programmatically convert an operator such as Equilibrium into its displayed form as a string? The conversion should work like this: ...
7
votes
1answer
241 views

Setting up TextStyle with initialization cells in Mathematica 6+

It used to be quite straightforward to change the default settings of a notebook in terms of inputs, outputs, text styles and font sizes in previous versions of Mathematica using initialization cells ...
5
votes
2answers
289 views

How to create a ListLinePlot with a layout analogous to ChartLayout -> “Stacked”?

I am using 3 checkboxes as desktops, portables and ipods in such a way that when I click to desktops it should shows ListLinePlot of ...
14
votes
2answers
566 views

How to replace the style of the inline cell in a StyleSheet

I would like to change a StyleSheet in such a way that any text that is typed into the inline cell (the one created by Ctrl+9) is shown in a different font (e.g. the font of my choice). At present I ...
8
votes
1answer
422 views

CDF and personalized style

I recently created a custom stylesheet. I then created a notebook with the new style, confirmed that the notebook had adopted the style, and then saved a copy in CDF. But when I opened the CDF in ...
7
votes
3answers
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. ...
0
votes
1answer
319 views

How can an InverseQuantile or an interval valued Quantile function be implemented in Mathematica?

Quantile[] is the workhorse method in robust data analysis and statistics (see, eg Koenker's Quantile Regression). However, it should be complemented by an ...
16
votes
2answers
622 views

Exporting a dashed plot with a color gradient to a vector graphics format ruins the dashing

When exporting a dashed plot with a color gradient to a vector graphics format such as EPS or PDF, the dashing is partly ruined. For example, this command: ...
2
votes
1answer
92 views

PaneSelector and options in a Module

Consider the following snippet of code: ...
8
votes
5answers
2k views

How to create a list of pairs from 1d list(s)?

Say I've got two 1-dimensional lists A = {1,2,3} B = {a,b,c} How do I create a list of all pairs from list A such that the ...
5
votes
0answers
161 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 ...
12
votes
1answer
264 views

How to create a notebook element that can replace itself?

I would like to create a notebook element that can replace itself. Here's an example to illustrate: ...
11
votes
1answer
333 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 ...
2
votes
2answers
919 views

How to display a different number of significant digits in each column of TableForm output?

Say I create a table with three columns of numbers. Is there a way to control the number of significant digits displayed in each column. To make this concrete, take the following command: ...
5
votes
2answers
374 views

How to add graphics options to an already produced plot having manipulator?

I am new to Mathematica and stuck with one problem i.e. How can I add a graphics option to an already made plot which a manipulator to control itself. ...
6
votes
0answers
294 views

Inverse of a large sparse Hermitian block matrix

I am looking for a method (if it exists) for the inverse of a large sparse Hermitian block matrix. The off diagonal sparse matrices, named δ are 4x4, and they have ...
7
votes
2answers
500 views

Manipulating an equation into standard quadratic form?

Say I have an equation of the form $$u s + \frac{1}{v} + \frac{1}{p s + q} = 0$$ (or any form that can be written as a standard quadratic, really, the above form is just an example; they'll all be ...
18
votes
3answers
2k views

How to symbolically do matrix “Block Inversion”?

Consider a block (partitioned) matrix matrix = ArrayFlatten[{{a, b}, {c, d}}] where, a, ...
8
votes
1answer
187 views

Reducing the memory footprint of lists of machine numbers

I have a large 1D dataset of double precision numbers that are stored in many external database files. In order to load the whole dataset into Mathematica 8 I iterate over the files ...
8
votes
1answer
243 views

Creating a version of SequenceAlignment that accepts patterns

SequenceAlignment seems like a function that is not (yet?) fully integrated into Mathematica. I want a function that accepts general patterns instead. I ...
6
votes
2answers
240 views

Manipulators and Dynamic in more concise code

Is there a way to update dynamic variables through a function. I was looking back at one of the answers from Heike where she showed me how to make my custom ...
13
votes
3answers
795 views

How can locators be added to the points on a 3D grid?

Here is a pared down example of some 3D data that I want to make dynamic and add locators to each set of points. Is that possible? ...
12
votes
3answers
632 views

Formula Formatting is Small and Chunky?

I'm sure I'm about to embarrass myself... but, here goes... I can't read any (but the most basic) typeset formulas in Mathematica. The fonts are simply way too small on my 2560x1440 monitor. If I ...
5
votes
3answers
308 views

Rendering polygon as graph with directed edges in Mathematica

In Mathematica I'm trying to render a polygon as a set of vertices and directed edges. What I have so far: ...
6
votes
3answers
682 views

Can I use a custom (Frame)Ticks specification to define the PlotRange?

The documentation for Ticks and FrameTicks shows how one can define a function for custom ticks or frame ticks, for example: ...
4
votes
1answer
520 views

Why FindFit could not exactly fulfill condition?

I tried to fit some data with boundary conditions, but FindFit just could not work. Does anyone know the reason? Details: The function to be fitted is ...
5
votes
1answer
669 views

Efficiently exporting many images as a video

I have many .gif images and I would like to export them as a single video file (I prefer .mov, but any video format is fine). But what if I have several tens of megabytes of .gif images? Is it ...
13
votes
2answers
504 views

How to monitor the progress of Read?

I use f = OpenRead["largefile.m"] x = Read[f]; Close[f]; to read in a Mathematica expression from a large file largefile.m ...
7
votes
2answers
400 views

Detecting double click events

Is there a way to detect double click events? I did not find anything on the doc page of EventHandler. Use case: I want to re-implement the ...
21
votes
2answers
351 views

What is the equivalent of a prototypical Manipulate in lower level functions?

Background: In the Mathematica tutorial 'Dynamic Interactivity' I read that there is a way of developing GUIs in Mathematica that do not use Manipulate. I want to ...
8
votes
2answers
423 views

TeX and TraditionalForm

I have a little problem, and hope, with your help, I'll be able to solve it. As you got from the title, I have some trouble with TeX in Mathematica. Imagine, I want to output a nice DisplayFormula, ...

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