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11
votes
1answer
275 views

Possible bug with second argument of Dynamic

Bug fixed in V 10. According to the documentation, Dynamic Details & Options section, especially: For interactive mouse operations ...
7
votes
3answers
428 views

Poor quality Rasterize output when Background -> None

I am attempting to generate partially transparent images for PNG Export, but seem to run to the following issue. If I Rasterize ...
9
votes
1answer
114 views

FindHamiltonianCycle is not invariant to edge permutation

Found this bug-like behaviour today: if the order of edges is changed so that VertexList does not return the vertices in canonical order, ...
7
votes
1answer
101 views

Bug in GeneratingFunction?

According to the documentation GeneratingFunction[a[n],n,x]==Sum[a[n]x^n,{n,0,Infinity}] However, for $a_n=1/(n+2)$ I obtain ...
12
votes
1answer
235 views

MapIndexed and Compile

I am having trouble compiling a function that uses the MapIndexed function on the second level. The compilation runs fine, but at evaluation time I get an error ...
4
votes
4answers
138 views

How do I emulate DiscreteUniformDistribution in Mathematica?

How do I define a function from scratch that emulates DiscreteUniformDistribution? As shown below, attempting to use ...
5
votes
3answers
290 views

BSplineFunction derivatives wrong if using weights?

In my work, I make heavy use of non-uniform rational B-spline (NURBS) functions, defined using the function BSplineFunction with the option defining ...
2
votes
2answers
453 views

EdgeRenderingFunction question

Bug introduced in 9.0 and fixed in 10.0.0 (Edit 1 : I added this paragraph after the original post, for context) Some context for this question can be found in another post ...
9
votes
1answer
303 views

Mathematica9: NDSolve slows down after repeated calls

I have noted that in Mathematica 9 my code, which involves a lot of calls to NDSolve, slows down considerably after some time. Apparently, the problem is NDSolve itself and it seems to be related to ...
7
votes
1answer
375 views

Why does Simplify with TimeConstraint return Removed[$$Failure]?

Bug introduced in 7.0 or earlier and fixed in 10.0.0 I have a rather ugly Mathematica expression (edit: shown below) that I would like to simplify with a time constraint; simplifying without a time ...
28
votes
2answers
698 views

eigenvector bug?

Bug introduced in 7.0.1 or earlier and fixed in 10.0.0 I have a fairly simple $3\times3$ complex matrix, $$ M=\left( \begin{array}{ccc} \frac{7}{2}-\frac{i}{2} & -1+i & \frac{1}{2}+\frac{5 ...
17
votes
1answer
199 views

How to format usage messages such that function templates are parsed correctly?

Is it possible to format usage messages (with italic arguments etc) such that Mathematica 9 still parses function templates correctly? For example, plain usage messages work when pressing ...
1
vote
0answers
201 views

Positive integrand giving negative answer

I'm integrating a positive function f(t) times sin(t) from 0 to pi/5 and get -38. Actually f is slightly negative for a short time (smallest value ~ -0.0005), but far from enough to explain this. ...
6
votes
3answers
535 views

ListPolarPlot not showing full plot range even with PlotRange -> All

I have a list of data dpdOt (given below) with associated angular coordinates thetaplot, which when plotted using ...
2
votes
0answers
81 views

Det and MatrixRank freezes on SparseArray with nonzero default value

Why does the following simple code never come to an end (at least with version 8) n = 5; mat = SparseArray[{i_, i_} -> 1, {n, n}, -1/(n - 1)]; MatrixRank[mat] ...
3
votes
0answers
266 views

Weird behaviour from ListSurfacePlot3D

Looking at Documentation for ListSurfacePlot3D, I follow the basic example presented there. ...
9
votes
2answers
290 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 ...
4
votes
0answers
92 views

2X slower with ; — LibraryLink performance problem [duplicate]

This is the continued problem of the LibraryLink memory usage question here and here. In the following code, there is a 2X performance difference with only the change of ";". ...
8
votes
1answer
183 views

Where is my memory? — LibraryLink never returns the memory

This is an example LibaryLink code from Mathematica documentation, which takes an integer and return an integer list: ...
19
votes
2answers
518 views

Have I found a bug in Integrate?

The following command gives 0 in Mathematica 9.0.1. ...
1
vote
1answer
138 views

Spelling dictionary corrupted

I have a problem with the Check Spelling in Mathematica, that I quite don't understand: If I try to use the Check Spelling on any notebook, the check just stop before the first word and in the field ...
8
votes
1answer
240 views

Error while exporting to Excel with named sheets

Using Mathematica v9.0.1 This example is from the docs: ...
3
votes
1answer
163 views

Exporting large png results in completely black image

When trying to export an Image as PNG the resulting file is a completely black image. This happens only for certain images I have not been able to determine exactly ...
9
votes
2answers
324 views

Why LibraryLink function crashes at a second time?

Bug is present as of version 10.1 on OS X 10.10.3 Update As Todd Gayley commented under halirutan's answer, this is a bug. I'm trying link one of Lapack's function to Mathematica through ...
22
votes
1answer
422 views

Why does list assignment with a packed array result in unpacked values?

Bug introduced in 5.2 or earlier and fixed in 10.1.0 This is another question on the design choices in Mathematica. I understand that without direct reply from the developers it may not be ...
5
votes
1answer
189 views

Error messages from compiling the Piecewise function

The following works Compile[{{x, _Real}}, Piecewise[{{{0., 0.}, x > 5.}}, {1., 1.}]] but if I enter the Piecewise[...] in ...
8
votes
3answers
272 views

PlotMarkers don't change colour for different lines

I have a set of data and several function operating on the same data, that I wish to plot together in a ListPlot. I need different ...
12
votes
1answer
263 views

Why is my rasterized graphic blank?

Bug introduced in 7.0 or earlier, and persisting through 10.1 or later (OSX 10.10.2) Consider the following code: ...
5
votes
1answer
184 views

Error in ARIMAProcess example

I am trying to compile the sample of ARIMAProcess of MMA here .It doesn't work.What is wrong?Could you please help?I am using exact same code. ...
13
votes
2answers
493 views

How to embed an image into a string?

Note: The bug described in the post is in Mathematica 9, and has been fixed in 10.0. The documentation for String contains the following statements: Strings ...
11
votes
1answer
475 views

RLink and R v3.0.1?

Running InstallR["RHomeLocation" -> "C:\\Program Files\\R\\R-3.0.1"] results in a popup box titled "Version Mismatch" saying Error: R.DLL version does ...
4
votes
1answer
414 views

InverseFunction on an Interpolating Function is misbehaving

I am getting strange behavior when I try to calculate the inverse of an interpolating function for two similar data sets. My data sets are: ...
7
votes
1answer
444 views

Mathematica 9 can't integrate this function but earlier versions could

Integrate[ ArcTan[x]/(1 + x) Log[(1 + x^2)/2], {x, -1, 1}] I used Mathematica 9.0.1 on Windows7 32bit, Mathematica 9 cannot compute this, but Mathematica 8 gives ...
13
votes
2answers
499 views

Problem importing URL with Greek characters

I'm considering buying a car. So I thought why not make a web-crawler in Mathematica to pile-up car data? Brilliant idea. Then I found this Greek website, gocar.gr, which just so happens to have all ...
5
votes
0answers
197 views

Exporting large numbers in WDX format

I have a list of 10 000 3×3 matrices in Mathematica. The entries are rational numbers. I would like to write this to a file so I can load it again in the future. After some fussing with file formats, ...
15
votes
2answers
668 views

How accurate is GeoDistance?

Two years ago I tried an evaluation copy of Mathematica. I reported various inaccuracies in the GeoDistance routine to which I never received any fix. Could ...
8
votes
1answer
287 views

Mathematica8 can compile this function but Mathematica 9 can't if I set CompilationTarget -> “C”

Following code worked on Mathematica 8, but in Mathematica 9 it can't be compiled, it return this message CompiledFunction::cflist: Nontensor object generated; proceeding with uncompiled ...
2
votes
0answers
294 views

Why my Mathematica 9.0.1 wont work with some samples of Mathematica in Graph Theory?

I updated my Mathematica recently to 9.0.1 cause the previous version was giving me freaky result especially in FindMinimumCostFlow and ...
9
votes
3answers
362 views

Why is this parallel evaluation with Dispatch[] so slow?

Can you efficiently parallelize this? The parallel versions are much slower than the sequential version, and I'm not sure why. Does SetSharedVariable allow ...
32
votes
2answers
1k views

Variable naming changes everything

I am having a rather unusual problem I do not understand with Mathematica where renaming one of the variables of my function causes the function to stop "working". Here is the example of the code ...
6
votes
1answer
216 views

Importing images from the web using ImportString & URLFetch

I can bring images from the web using the Import command like this: Import["http://blog.wolfram.com/wp-content/uploads/2008/06/se-30.jpg"] Sometimes the web ...
13
votes
0answers
190 views

Compile not correctly initializing a variable defined inside Module

In the following example, inside the minimumX's Module, x is initialized to 1, but the ...
4
votes
1answer
115 views

RSolve gives a Context::ssle error

I want to solve the following recurrence equation RSolve[{(k + 2) c[k + 2] q^(k + 1) - c[k] == 0}, c[k], k] During calculation in Mathematica I get this ...
5
votes
1answer
140 views
10
votes
1answer
580 views

Why can't I change the value of MaxRecursion in NIntegrate when integrating BesselJ?

Bug introduced in 8.0.4 or earlier and persists through 10.0.2. I am trying to evaluate this integral numerically $$ \int_0^{\infty } J_0(q R) \tanh(q) \, \mathrm{d}q $$ for large values of $R$. ...
5
votes
1answer
221 views

Error invoking Information on functions containing Legended

In adapting some plotting functions to utilize the PlotLegends option of version 9, I came across the following errors: ...
4
votes
2answers
139 views

Strange behavior of Integrate

I'm trying to calculate the following integral using Mathematica 9.0.1.0 a11=Integrate[Abs[Sin[b+x]],{x,0,2*\[Pi]}] This should be a simple problem; however, it ...
9
votes
1answer
434 views

FourierSeries for rational function looks wrong

I have the following code: ser[x_] = FourierSeries[(\[Pi]^2 + a)/(3 x^2 + a), x, 10] // N // Chop It gives me some series, which I then try to plot. And ...
2
votes
0answers
284 views

Derivatives of list elements

Could someone explain the odd behavior of the Derivative function when drawing arguments from lists? We have, ...
6
votes
0answers
106 views

Compiled function crashes kernel when trying to list over different length arguments

I'm trying to speed up a tally/binning operation that I have to run many times. I have many lists of between 1 and 10 numbers from the range [1,5] and I want to ...