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7
votes
1answer
276 views

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

Bug existed in version 7 and is fixed in version 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 ...
24
votes
2answers
459 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 ...
15
votes
0answers
156 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
164 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
390 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
77 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
227 views

Weird behaviour from ListSurfacePlot3D

Looking at Documentation for ListSurfacePlot3D, I follow the basic example presented there. ...
8
votes
2answers
233 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
91 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
173 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: ...
17
votes
2answers
469 views

Have I found a bug in Integrate?

The following command gives 0 in Mathematica 9.0.1. ...
1
vote
1answer
116 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 ...
7
votes
1answer
188 views

Error while exporting to Excel with named sheets

Using Mathematica v9.0.1 This example is from the docs: ...
3
votes
1answer
148 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 ...
7
votes
2answers
291 views

Why LibraryLink function crashes at a second time?

I'm trying link one of Lapack's function to Mathematica through LibraryLink, and the Library function works great at the first execution but crashes at the second time. Here is the code (modified ...
5
votes
1answer
164 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
231 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 ...
10
votes
1answer
196 views

Why is my rasterized graphic blank?

Consider the following code: ...
5
votes
1answer
162 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
438 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
407 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
314 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
370 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
402 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
154 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, ...
11
votes
2answers
579 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
275 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
284 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
323 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 ...
31
votes
2answers
963 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
175 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 ...
9
votes
0answers
150 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
110 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
129 views
9
votes
1answer
465 views

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

I am trying to evaluate this integral numerically $$ \int_0^{\infty } J_0(q R) \tanh(q) \, \mathrm{d}q $$ for large values of $R$. This makes the integrand oscillate more quickly and Mathematica ...
5
votes
1answer
218 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
133 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
409 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
226 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
97 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 ...
7
votes
2answers
300 views

Problem with NIntegrate when WorkingPrecision is specified

I am trying to evaluate this integral numerically: $$ \int_0^{\infty } m \exp (-m) J_1(m){}^2 \, dm $$ Everything is OK when only the integration method is specified: ...
13
votes
1answer
347 views

Why does Mathematica give an incorrect answer to this multiple integral?

This is not a new problem but I would like to understand why Mathematica gives the result that it does. (Volume of a hypersphere) ...
5
votes
4answers
190 views

FrameLabel not printing completely

Running this code: ...
15
votes
2answers
265 views

Upon PDF export, edgeless rectangles do not tile perfectly, and corners may be cut. Is this a bug?

Note: this problem is no longer present in version 10. Exporting the following as a PDF file ...
12
votes
1answer
240 views

ToNumberField won't recognize Root as an explicit algebraic number

In Mathematica 9.0.1, it appears that ToNumberField will not always recognize a Root object as an explicit algebraic number. ...
3
votes
0answers
329 views

Cannot save file

Hello I have a problem in saving files in Mathematica. I can't save not only notebooks but also figures. When I choose to save the notebook it open a window that says: Mathematica could not find ...
8
votes
0answers
124 views

Help bogged down at first query [duplicate]

When I open help at the first time in a mathematica session and I submit a query it always get bogged down for many seconds until a message appears as in the picture. Then I select continue waiting, I ...
4
votes
0answers
183 views

Strange result from evaluating a Limit expression

When I evaluate the limit of (1-Cos[x]) Sin[1/x] at x = 0 in Mathematica 9, I obtained ...
7
votes
1answer
102 views

Crash with subsetting TemporalData

The first line gets a single sample path for an M/M/1 queue for time between 0 and 100. No problem, I can plot it, etc. ...
6
votes
1answer
126 views

Tooltip not working in web deployed cdf

I deployed a CDF file in a web page. I used both Mouseover and Tooltip functions. They both work in the raw CDF file. The ...