10
votes
2answers
251 views

Encoding format used by GraphicsData?

I am trying to extract some graphics stored in PICT format from a Mathematica notebook, using a platform that doesn't support PICT. If I look at the .nb file in a ...
10
votes
1answer
460 views

Mathematica Source-Code Control for CDF files in multi-user scenario

Q: I'm putting together a strategy on how its best to maintain cdf documents with multiple users in a source code repository. Ideally I wish for users to create (unit tested) cdf's with data and ...
10
votes
3answers
880 views

Passing down arguments

In R, one can use ... to pass arguments down to another function. For example ...
10
votes
5answers
410 views

Finding time-series direction reversal of certain magnitude

I'd like to find the points of a time-series that are a certain distance away (in value, not in time) from the previous maximum, which I consider a reversal. For example, for ...
10
votes
3answers
1k views

Most Efficient Way to Calculate the Product of All Items in a List?

Say that I have a list of returns on a financial asset over time and want to know the total compounded return. To get the answer, I need to add 1 to each return and then calculate the product of all ...
10
votes
5answers
549 views

How do you efficiently return all of a List but one element?

I have a problem that I am working on that requires that I compare several lists of overlapping data points. As I traverse one of the lists, I'd like to only compare those data to the other lists, and ...
9
votes
2answers
277 views

Using map projections with astronomical data

I noticed that all important "Geoprojections" are available in projections for a spherical reference models: GeoProjectionData function; 1 - I am trying using the sinusoidal projection for ...
9
votes
1answer
95 views

Installing LinkSnooper on Windows

I tried to install LinkSnooper on my Windows 7 computer, as described in the documentation and here. According to the answer of @Todd Gayley, I entered the following string in the field MLOpen: ...
9
votes
2answers
153 views

Export[] performance

Consider this sequence of commands: ...
9
votes
3answers
174 views

Changing BarLegend border style

I want all the lines in my plot to be a consistent style, let's say thick and black for the purpose of this question. ...
9
votes
2answers
2k views

Why is this semicolon in red?

I have a piece of code that works well, but when I put a semicolon after a plotting statement, the semicolon appears in red. What's the error?
9
votes
2answers
529 views

Memory leak issues

I am working with noncommuting objects and basically I am using Mathematica to sort large expressions by normal ordering and simplifying them. To this end, I first create an object called ...
9
votes
3answers
14k views

MathLink linking error after OS X 10.9 (Mavericks) upgrade

After macosx 10.9 mavericks upgrade i have a compilation problem, you can see below. Even the examples given in ...
9
votes
4answers
411 views

When should I use Apply (or Function) and when @@ (or &)?

This is a rather general question, which I fail to answer myself. I guess it is mainly due to my insufficient knowledge of the precise terms. If I understand correctly, the following are equivalent: ...
9
votes
1answer
273 views

Efficiently filling area with disks located at certain points

Starting from a set of points, I want to fill an area using disks. Each disk's center should be one of the points and the disks should not overlap. I've managed to write a function that, given a list ...
9
votes
2answers
316 views

Is there a way to programmatically set global preferences?

Can I set global preferences that are accessible via "Edit"->"Preferences" programmatically from within a notebook? As learned from this question, turning off anti-aliasing can make a huge difference ...
9
votes
2answers
566 views

Extracting vertex coordinates from an automatically laid out graph

Given a Graph with an automatically computed layout (i.e. not explicitly given VertexCoordinates, but using a ...
9
votes
2answers
323 views

Transition between graphs

I want to visually demonstrate the manipulations made to a graph. For instance, I have a graph g where using the command ...
9
votes
3answers
385 views

Why is AstronomicalData so slow?

I'm having trouble getting some pretty simple functions using AstronomicalData to perform at anywhere near the speed I need them to. For example, I have many ...
9
votes
3answers
535 views

Different calculation of median and quartiles, bug in BoxWhiskerChart?

When you plot a dataset with BoxWhiskerChart passing over the box in the plot with your mouse pointer shows some specifics about the dataset (min and max values, ...
9
votes
3answers
679 views

Improve speed for calculating a recursive sequence

I want to calculate following recursive sequence: $\alpha_{0}=0,\\ \cos(\alpha_{i})=\cos(\alpha_{i-1})\cdot\cos(\beta_{i})+\sin(\alpha_{i-1})\cdot\sin(\beta_{i})\cdot\cos(\gamma_{i}).$ In ...
9
votes
3answers
413 views

How to use Locators on a graphic in a tabview

Background: I want to split graphics in a Manipulate in several parts in a tabview control. But the tabview somehow interferes with the locators as in the following simplified example: ...
9
votes
1answer
172 views

Is there a way to have a Tooltip for non-editable raster graphics produced by MakeBoxes?

I have a function which produces a large object I would like to hide. Formatting is of course an option but I'm hoping for something a little more meaningful using raster graphics and ...
9
votes
1answer
279 views

SubTitle and SubSubTitle do not group by default

For some reason, the SubTitle and SubSubTitle cell formats do not group automatically on my machine any more, and I cannot ...
8
votes
5answers
499 views

How to subtract one list from another, treating each elements as distinct? [duplicate]

Suppose that I have a = {"A", "A", "A", "B", "B", "C"} b = {"A", "B"} How can I subtract b from ...
8
votes
5answers
415 views

What is my problem with MeshFunction?

I want plot the max value in a sine plot. We can use the following code ...
8
votes
4answers
458 views

Join two datasets on keys

I want to be able to join two datasets by keys, pretty much like I'd do in SQL. I thought the JoinAcross function might do it, but it doesn't operate the way I thought. The example in the ...
8
votes
5answers
809 views

Generating an Ulam spiral

An Ulam Spiral is quite an interesting construction, revealing unexpected features in the distribution of primes. Here is a related topic with one answer by Pinguin Dirk, who has provided one ...
8
votes
1answer
205 views

Inconsistent DistributionFitTest results?

In pondering this question, I used Mariana's function to generate the following data. ...
8
votes
2answers
201 views

The introduction for Context in Wagner's book is out of date? [duplicate]

In Section 8.1.1 (P230 of the book, P249 of the PDF) of Wagner's book, the following example is shown: x = 5; temp`x = 6; Begin["temp`"]; {x, Global`x} The ...
8
votes
3answers
338 views

Deleting quasi-duplicates from large list efficiently

I have the need to remove "duplicates" from large (>10K members) lists, where a "duplicate" is either a verbatim duplication, or the element's second entry exists as a first entry for some "earlier" ...
8
votes
2answers
280 views

How to un-eat memory?

Consider this code: ...
8
votes
2answers
356 views

Goto and Compile

...
8
votes
1answer
327 views

How to convert Graphics3D object into an Image3D object?

How does one convert a Graphics3D object into an Image3D object? E.g., start with ...
8
votes
1answer
538 views

Extract matrix from a system of linear equations [duplicate]

I have a big system of linear equations $f_i(x_1,...x_n)$ with $n$ variables and $n$ equations. I want to extract the matrix $M$ where $\vec{f}(\vec{x})=M\vec{x}$. For example if I have $$ f_1(x) = x ...
8
votes
1answer
196 views

Unexpected behaviour of Solve applied to two equations in two variables

I have a simple Mathematica expression Solve[{a(a-1)Sqrt[1+a^2+b^2] == b(a^3-1), b(b-1)Sqrt[1+a^2+b^2] == a(b^3-1)}] which returns (on version 8.0, and also ...
8
votes
3answers
192 views

Preserve information in flattening a nested list

I have a series of lists in the form below: list={ {1,1} , {2,2}, {3,{3,1},{3,2},{31,{31,1},{32,2}}} } Its a nested list which the dimension is changing case to ...
8
votes
2answers
221 views

Combine InputAlias with InputString to parse expressions from a string

My knowledge of low-level notebook programming is very limited so I would be very grateful for any input regarding the following issue: I would like to define an input alias (via ...
8
votes
2answers
329 views

How to draw a contour diagram in Mathematica?

This answer at Math.SE contains a neat contour diagram created using Mathematica: What Mathematica functions I can use to draw diagrams like this?
8
votes
1answer
173 views

Converting to InputForm or StandardForm without deleting comments

Following on from this question: Is it possible to convert an expression to InputForm or StandardForm without losing the comments? For example, ...
8
votes
1answer
158 views

Retrieving the text of a message

Is there a simple, built-in way to retrieve the text of a message, given it's identifier (such as Power::infy)? The documentation describes how ...
8
votes
4answers
625 views

How can I highlight the points lying between two lines in a ListPlot?

I have a list of numbers like the following: list = Table[RandomInteger[1000], {i, 1000}]; And I plot them so: ...
8
votes
3answers
530 views

Fast Sieve Implementation

I'm going to write a code to compete in performance with NewPGen. The goal is to sieve numbers that have small factors. Mine is very slow in compare with NewPGen. Here's my code: ...
8
votes
1answer
391 views

Enhanced “Complete Selection” (dynamic autocomplete) for Text input?

The autocomplete ("Complete Selection") feature Ctrl-K (or F2 on Windows) works fine for functions and code input. Is there a way to enhance it for text input? Today’s standard (see e.g. OpenOffice ...
8
votes
1answer
256 views

Determine page count programmatically [duplicate]

Possible Duplicate: Generating a table of contents By selecting File > Printing Settings > Headers and Footers from the menu, I am able to enter << Total Pages >> to print the total ...
8
votes
2answers
216 views

Why does the name of a pattern affect the result of a transformation rule?

I was playing a little dirty, trying to get a template for defining a Curl[] operator. I wrote the following rule, which I knew was going to spit out a few ...
8
votes
3answers
615 views

Variable variable names

I have two variables, $ u \in \{0,40\}$ and $\gamma \in \{0,1\}$. I take $10$ values of $u$ and $5$ values of $\gamma$ and using their combinations as a pair of input parameters, I perform some ...
8
votes
1answer
891 views

(Non-Convex) Polygon Union and Intersection Functions [duplicate]

Possible Duplicate: Intersecting graphics Back in 2009 I posted a question in comp.soft-sys.math.mathematica looking for a function which generates the union of two (not necessarily convex) ...
8
votes
1answer
911 views

Emacs key bind on Mathematica Linux

This might not be Mathematica specific question but if there is anyone who can use Emacs keybind on Ubuntu Linux, would you share how you realize it? I'm using Mathematica student edition both on ...
8
votes
1answer
539 views

How to properly DumpSave & Get Global`s symbols inside packages while not touching Global context?

For efficiency reasons I prefer to use DumpSave instead of Save. For ease of access I prefer to save symbols in ...

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