9
votes
1answer
147 views
9
votes
3answers
3k views

Expressing a decimal as a fraction in lowest terms

How can I express a decimal such as 0.1845095405274387 as a fraction in its lowest terms?
9
votes
1answer
652 views

CUDALink not working on Mac OS X

On my MacBook Pro, I have a CUDA enabled video card, yet Mathematica does not seem to recognize this. For example, following the CUDALink Setup, I get ...
9
votes
2answers
410 views

Restrict Locator to a certain graphic inside Manipulate

I would like to restrict the Locator inside Manipulate to a certain graphic. For example if I display two graphs, I would like to be able to click on the right one and use this information in other ...
9
votes
2answers
451 views

Shaping/simplifying equations in a certain way

A problem I am occasionally facing is to simplify an equation not to it's shortest form but to a form that is simple by other means. Often, this is grouping the term according to certain functions, ...
9
votes
4answers
560 views

ParametricPlot3D output without the meshlines

Caveat: Mathematica version 3.0. if (or when) it matters. I define a 3D-object with ParametricPlot3D, say, the following: ...
9
votes
8answers
489 views

Adding elements to a collection of lists

I would like to add element a at the start of a series of lists. For example I have a collection of lists called ...
9
votes
3answers
428 views

How to format numbers with at least one figure after the decimal point

I'm searching for a way to get Reals formatted with at least one figure after the decimal point. So e.g. 3. should be printed as 3.0 and ...
9
votes
3answers
243 views

Splitting a list in which figures vary from negative to positive

Consider the following list: data={4078, 256, -1266, -388, 1290, 1368, 1446, 1524, 2}; I would like to split any kind of such list always, when figures turn form ...
9
votes
2answers
303 views

Align Array Plots

I have two ArrayPlots that I would like to align but my "tweaking" failed yet. I would like each "row" to be aligned. ...
9
votes
1answer
375 views

Mathematica implementation of Earth Movers Distance?

Has anyone implemented in Mathematica the Earth Mover's Distance (EMD)? A concept dating back to Monge 1871, used to compare histograms and images, e.g., the CIEDE2000 Color Difference algorithm. ...
9
votes
2answers
913 views

Labels and tickmarks inside Frame

Is there a way to force Plot and related functions to place the tick labels inside, rather than outside a frame? For example, consider, ...
9
votes
3answers
345 views

Problem when defining variable in Mathematica

I'm trying to run this: domain := {n, 0, 10}; Plot[n, domain] but it doesn't work. Instead, it generates the message ...
8
votes
1answer
84 views

Possible Bug in ProbitModelFit when used in a Dataset

Since upgrading to Mathematica 10 on Mac OSX I have come across a number of instances of this error, which occurs using Probit and Logit model fit. A bit of googling show this is something to do ...
8
votes
1answer
277 views

Generating high quality charts in Mathematica for use in LaTeX and Word

I frequently have a probelem using my charts in reports because the text (axes labels and tick marks) look low resolution (fuzzy). When I export my charts, i export them as PNG files. Unless I'm ...
8
votes
1answer
140 views

AndersonDarlingTest and DistributionFitTest Leaking Memory

I believe AndersonDarlingTest and probably all other tests are keeping a copy of data somewhere and not freeing it: ...
8
votes
4answers
291 views

Numerical instability in cosh and sinh - integral functions [duplicate]

I'm trying to calculate the function: CoshIntegral[x] Sinh[x] - Cosh[x] SinhIntegral[x] Unfortunately Mathematica seems to hit a point (x~20) and things become ...
8
votes
4answers
287 views

Generate PrimePower counting function

Is there a way to generate a counting function for prime powers - i.e. to create a similar function to PrimePi, but including prime powers. The following will, of ...
8
votes
0answers
107 views

Esc-esc for special characters and autocomplete in Mathematica 9 [duplicate]

I recently upgraded to Mathematica 9 and have noticed a slightly annoying behavior that I was looking to remedy. In the past I would type special characters, e.g. ...
8
votes
2answers
220 views

PlotRangeClipping not working correctly with small ImageSize and PDF-export

Although Mathematica has some nice plotting capabilities, there are some things which are annoying me: I like to export a Graphics oder Plot to PDF for use in $\LaTeX$. I like to a have an ImageSize ...
8
votes
4answers
378 views

Partitioning a list by recursion (Programming Paradigms via Mathematica (A First Course))

I am working through the course Programming Paradigms via Mathematica. One of the homework exercises for the section Recursion I: Passing the Buck is as follows: Use recursion to partition a ...
8
votes
2answers
251 views

Correct way to generate large data sets (i.e.forward yield curve )

I would like to generate a set of forward yield curve matrix of size 1000 x 100. First I defined my SparseArray of 1000 x100: ...
8
votes
5answers
303 views

How can I find these patterns' signatures?

I think I can explain it best starting with an example. I have the following lists: ...
8
votes
2answers
209 views

Save notebook without including Front End version information

How can a notebook be saved without including the front end version? If you open a .nb file, you'll see something like ...
8
votes
1answer
364 views

Changing default ImageSize in the frontend?

I would like graphs to appear somewhat larger in my notebooks (running v8.0.4 on OSX 10.8.2). Naturally I can specify ImageSize in each individual plot, or drag ...
8
votes
1answer
124 views

Prevent Plus from threading InterpolatingFunction

For an InterpolatingFunction $y:\ \mathbb{R}\to\mathbb{R}^2$, Plus is unaware of this, so when I do any modifications to it in ...
8
votes
1answer
751 views

Efficient evaluation of functions defined by NIntegrate

I have a complicated function $f$ and I want to plot the function $F(x)$ defined by the definite integral of $f$ from $0$ to $x$: $$ F(x) = \int_0^x f(y)\mathrm dy. $$ Apparently $f$ cannot be ...
8
votes
1answer
323 views

Symbolic Integration along contour: branch cut problem?

Context Following this question on path integrals in the complex plane, having defined again a numerical and symbolic integrator along a path as ...
8
votes
1answer
370 views

Converting other C++ classes to MTensor in LibraryLink

Hopefully this will be a quick question + a quick answer: Say I have a C++ (or C) code using LibraryLink. I am using a library that defines a specific matrix class, as many numerical libraries ...
8
votes
1answer
726 views

RegionPlot (or FillingStyle) using hash lines? [duplicate]

Possible Duplicate: Filling a polygon with a pattern of insets I have a RegionPlot (and sometimes a regular Plot) where I'd like to shade two different parts of it two different ways. Since ...
8
votes
1answer
808 views

Exporting a Large Multidimensional Sparse Array

I'm trying to export a sparse array from Mathematica to share with collaborators who primarily use Matlab. The sparse array in question is 4 dimensional, (72 x 93 x 94 x 172) with ~4M non-zero ...
8
votes
1answer
3k views

how to make graphic timelines in mathematica

Hi does anyone know how to make timelines with mathematica? http://images.nationmaster.com/images/motw/atlas_middle_east/turkey_timeline.jpg something like that would be great! thanks
8
votes
5answers
288 views

How to resize the text content of a grid with it?

I am in a resizing mood these days. This code works quite well, up to a point. ...
8
votes
2answers
657 views

What is the Mathematica equivalent for the Excel function tinv()?

TINV() returns the t-value of the Student's t-distribution as a function of the probability and the degrees of freedom. For example ...
8
votes
2answers
318 views

Keeping Quotation Marks in Output

I am running into the following seemingly simple problem. I have this code: testphrase="i love you"; input=ToLowerCase[StringSplit[testphrase, Whitespace]] It ...
8
votes
2answers
290 views

Strange behavior of CreateDialog's WindowSize option

Compare the two dialog windows, created by the same code except in the first WindowSize has a value while I omit it in the second one. Note, that ...
8
votes
1answer
414 views

CDF and MediaWiki

Recently there was a handful of CDF embedding-related topics. However I would like to ask whether anyone has succeeded in embedding CDF into MediaWiki page? I've attempted to do so with the Widget ...
8
votes
2answers
267 views

WordData for other languages

Mathematica already includes dictionaries for a lot of languages. What I am looking for is a handy semantic/grammatic database for Hungarian, just like WordData for ...
8
votes
2answers
494 views

Most efficient way to obtain samples from high-dimensional multivariate distributions?

Is MultinormalDistribution[] efficient and easy to use for high dimensions? I have a variable $n$ representing the dimension of a Monte Carlo integration I do on a ...
8
votes
6answers
1k views

Producing cleaner Mathematica output

I asked this in chat and it turns out it would make for a good question make a posting for. I am writing up a handout type notebook and I'd like to have some clean output for presentation's sake. ...
7
votes
4answers
167 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 ...
7
votes
1answer
85 views

Possible bug involving Dataset/Query and RightComposition

Short Version Why are the results of the following expressions different? ...
7
votes
2answers
224 views

Does FindFit support complex numbers or doesn't it?

Inspired by this previous question: Findfit doesn't give the good fit; Changing the starting values will not change the results. Consider the following complex-valued dataset. ...
7
votes
5answers
788 views

Find intersection of pairs of straight lines

I have a list of 24 points, in which 2 consecutive points (1st and 2nd, 3rd and 4th, ...) are supposed to form a line. ...
7
votes
3answers
489 views

Any way I can solve this integral?

So, Mathematica can't solve it. Any workaround? \begin{equation*} \int_0^\pi \frac{1}{\sin\left(\frac{\theta}{2}\right)^\beta + 1} \mathrm{d}\theta \end{equation*} The code is: ...
7
votes
3answers
476 views

How to fix this memory leak

I am using halirutan's code in this thread to unflatten a list. It works very well but the problem is that the Module's local function f is not deleted when the ...
7
votes
1answer
244 views

How to use Undocumented Functions Prism, Tetrahedron and Hexahedron

Taking a look at this question and this one, I checked to see if Mathematica really does not have a Prism primitive. To my surprise the function ...
7
votes
1answer
181 views

Returning a value from a Module

In the following simple example MyMod := Module[{i}, Do[ Return[1], {i, 3} ]; Print["test"] ] I expected the module to exit on ...
7
votes
2answers
246 views

Is there a function which instantly tells you whether an element is part of a list?

I have a very long list of numbers and I want to check whether there's a function (something that would look like PartOfQ[element,list]) that tells you immediately ...
7
votes
1answer
108 views

How to understand shared passing of a MTensor in LibraryLink?

According to the documentation, there are four different type of memory managing when passing a MTensor with LibraryLink: Automatic, "Constant", "Manual" and "Shared". The Automatic and "Manual" is ...

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