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5
votes
1answer
103 views

FlipView can't handle CurrentValue[“MouseOver”]. Kernel crash

Is this code crashing your Mathematica session? (it can so look out :P) ...
1
vote
0answers
71 views

Mathematica exit when calling plot. Bug?

I'm currently studing the behaviour of some integral for which I cant find an analytic solution. As this function depend on a vector on the unit sphere, I first defined it with 3 parameters before ...
2
votes
0answers
74 views

Front End - Bug in Edit->Find?

As a beginner I make notes in my notebooks on what I am learning as I go along, and I have also referenced the help files by pasting hyperlinks from them - this seems to break the Find function. Is ...
0
votes
0answers
83 views

My plot is cut off if a frametick is “0” but resized if a frametick is “0.” Why?

I have been trying to customize the frame ticks and frame label around a certain contour plot and am running into very strange behavior where the graphics will get cut off by ...
4
votes
1answer
154 views

Why does one of my Manipulate integer variables get turned into a real?

I'm developing code for manipulating graphs. Spot the difference in the 2 Manipulates below: ...
4
votes
1answer
63 views
0
votes
0answers
46 views

Addition of sparse array objects [duplicate]

I have been having some trouble with the addition of large (but very sparse) matrices using SparseArray. Here is the simplest example to illustrate the issue. First, I will define diagonal matrices ...
7
votes
3answers
208 views

Problem with CurrentValue[“MouseOver”] when graphics are wrapped with Deploy

Please take a look at following toy example: ...
10
votes
1answer
185 views

Sporadic bugs in multidimensional SparseArray objects

Udate This SparseArray[] bug is (apparently) fixed on version 10.0 ...
4
votes
1answer
89 views

RandomSample Bug?

I was using RandomSample with very skewed weights. I am asking for a random sample of 6 numbers 1 through 100 without replacement. In the screen shown, the weights for 1 through 6 are 100 000, with ...
3
votes
1answer
83 views

Bug with LinearProgramming on Integers?

With Mathematica 7: LinearProgramming[{1, 1}, {{0, 0}, {1, 1}}, {1, 1}, Automatic, Integers] gives wrong result {0,1}. But ...
4
votes
2answers
120 views

Inconsistent results for equivalent converging symbolic integrals

I have looked at previous questions and I'm aware that this seems to be a known bug: Mathematica giving inconsistent results for symbolic integrals done in different ways. The origins for the bugs ...
20
votes
1answer
266 views

M9 performance regression for Fold?

Bug introduced in 8.0 and persisting through 10.0.2 or later I noticed an over 10x performance drop on Mathematica v9.0.1 (as Oleksandr R. commented, also v8) compared with v7.01 for this code: ...
11
votes
1answer
192 views

Unwanted PlotMarkers appear at non-existent places

In this simple code ...
12
votes
2answers
233 views

Strange behavior when using Row with packed arrays

Bug fixed in 10.0.0 Today I lost a lot of time with a strange behavior and I narrowed it down to this small piece of code: ...
4
votes
1answer
144 views

Exported animated gif with matrices will not work?

I want to export a list of matrices as a gif so that they will appear one after another 2 seconds apart. I've tried the following but when I open it up it only does the first two matrices and I have ...
2
votes
2answers
160 views

BarChart3D does not print zeros and odd tick positions

Note: This is a version 9.0.0 problem that is fixed in 9.0.1. I want to generate a simple 3D view of some frequencies for two variables. I have the counts in a 4x3 matrix, say. This is my bar chart ...
3
votes
1answer
196 views

Background in ItemStyle

I would expect the following to output the same grids ...
10
votes
1answer
243 views

Cancellation of common terms

Can someone explain why the term A in case 2 does not get canceled out when case 1 does? I use "9.0 for Microsoft Windows (64-bit) (January 25, 2013)" ...
0
votes
0answers
97 views

ParametricNDSolve: Parameter inside UnitStep leads to longer integration times

I have found one of the most annoying issues in ParametricNDSolve. When a parameters occurs inside UnitStep (and Piecewise and If) the integration takes much longer time. I illustrate this by an easy ...
8
votes
1answer
146 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: ...
10
votes
3answers
1k views

help to plot Poincare section for double pendulum

I am reading a book about classical mechanics. In the chapter about chaos, it gives the simplified and scaled equations for double pendulum as $$ \frac{d}{dt}\left[ \begin{matrix} \alpha \\[3mm] ...
4
votes
2answers
185 views

Reduce with Integer domain, but receive a rational solution

I want to find the integer values $k$ so that D[f[x], x] has integer solutions. I tried ...
3
votes
1answer
97 views

Cannot use CTRL + F and UN/COMMENT

I would like to ask a question with Mathematica 9.0.1. I find that both FIND: CTRL + F UN/COMMENT: ALT + / become unavailable. Pressing the shortkey or selecting from the menu could not activate ...
8
votes
1answer
276 views

How does LocationTest choose its “AutomaticTest”?

Is there a way of determining how LocationTest chooses its "AutomaticTest"? Sometimes it's clear from the ...
7
votes
3answers
124 views

Disable rounding up of PolarAxesOrigin

How to disable rounding up the radius which is used to calculate the origin of the polar axes with the option PolarAxesOrigin? Example: ...
2
votes
0answers
34 views

The value of PageWidth doesn't work for saving as HTML?

CellPrint@Cell["Test","Text",PageWidth->300,Background->Red] And I got this snippet of HTML code: ...
6
votes
0answers
152 views

Issue with FindCurvePath

I have a problem with the function FindCurvePath. In some cases it crashes the Mathematica 9 Kernel. Here an example, where it crashes the kernel: ...
21
votes
2answers
437 views

Graphics elements do not line up perfectly in exported PDFs

Graphics elements do not always line up perfectly in exported PDFs using "Save As..." method. Take, for example: ...
6
votes
0answers
169 views

Documentation for user-defined functions; undocumented documentation feature?

I stumbled on some strange behaviour when trying out the new function template and documentation features, now purportedly working in v 9.0.1. I defined a function ...
14
votes
4answers
244 views

Unexpected dots from Line

I have noticed cases where Line produces dots in a graphics object when I think it shouldn't. The first of these is: ...
3
votes
1answer
94 views

Is there really a bug in the following code, taken from the reference documentation for PetersenGraph?

PetersenGraph[5, 2, EdgeLabels -> {8 \[UndirectedEdge] 9 -> "hello"}] appears to evaluate perfectly, as expected, but in my version 9.0.1.0, the option ...
1
vote
1answer
104 views

Manual CellGrouping option causes crash at cell evaluation

Update: Try to reproduce this behaviour with CellGrouping set to manual. To do that: either evaluate ...
6
votes
1answer
72 views

Infix strange behaviour

Maybe this is a bug or maybe Infix acts differently than the other functions. The fact is that both: TreeForm[Infix[f[x, a]]] and ...
5
votes
0answers
176 views

Strange Integrate behavior (a bug!)

The following two calculations should give the same result. After all, integration is a linear operation. I have pasted the code below in case you want to play with it. ...
16
votes
1answer
245 views

Bug in RepeatedNull?

RepeatedNull appears to be buggy (versions 8.0, and 9.0). Define f as follows: ...
9
votes
1answer
324 views

Inconsistent results of second derivative of inverse fourier transform

I am trying to get the Green's function of a toy diffusion equation $$\frac{\partial^2 u(x,t)}{\partial x^2} = \frac{1}{\alpha^2}\frac{\partial u(x,t)}{\partial t}$$ with Mathematica 9. Then solve ...
10
votes
2answers
133 views

Rasterize uses default stylesheet if ImageSize is specified

If I make a style definition which affects GraphicsBox, the style is used by Rasterize unless I specify an explicit ...
18
votes
1answer
309 views

Kernel inexplicably hangs if I define a pure function without suppressing output

Save any unsaved work before trying as it may crash Mathematica and other programs by filling up the memory! In v9.0.1.0 on OSX 10.8.5, if I start a new session and define two functions ...
4
votes
0answers
145 views

Syntax error for optional pattern, but only in debugger

This expression (explained here by Leonid) evaluates fine unless Evaluation->Debugger is enabled: h[x : (_Integer) : 1] := x Syntax::sntxf: "x:" cannot be ...
4
votes
1answer
207 views

Numerical errors/inaccuracies in ProductLog

Context In cosmology, a fairly accurate model to describe the gravitational potential, $\psi(r)$ of dark matter halos is given by $\psi( r)=\log(1+r)/r$. ...
18
votes
1answer
461 views

Incorrect result from Integrate

I attempted to calculate the following integral: ...
8
votes
2answers
356 views

Goto and Compile

...
5
votes
1answer
114 views

Apparently contradictory output from Series and D

I defined a function as: g[b_] := Integrate[f[n]Exp[-b DA (n.u)^2], n] Obviously D[g[b], b] /. b -> 0 gives ...
12
votes
3answers
219 views

Wrong numerical value while exporting to a JSON string

The following code: ExportString[{"a" -> 2000000., "b" -> 0.000001}, "JSON"] Gives the results ...
4
votes
1answer
131 views

Forcing optimal solution for FindShortestTour

I use FindShortestTour as explained here and it works nicely for a small number of cities. However when I try this with as little as 16 cities, the given tour isn't ...
1
vote
0answers
91 views

LinearProgramming errors

I have a family of equations I want to solve over the non-negative integers. One particular instance of it is this. ...
5
votes
1answer
243 views

ListDensityPlot crashes the kernel

ListDensityPlot[ Flatten[Table[{i, j, Sin[i + j]}, {i, 1, 20}, {j, 1, 20}], 1]] gives the expected result, but a linear scale crashes my kernel (please save your ...
7
votes
1answer
246 views

ReadList can't read correctly

Bug fixed in version 10.0.2 on Linux I'm trying to load some data into Mathematica from some files generated by fortran. But ReadList seems can't get the number correct. Here is a simplified ...
5
votes
0answers
127 views

The same analytical expression gets inconsistent FourierTransform results

I have an expression which is just a linear combination of plane waves, and I'd like to calculate FT of it. I know what I will get should be a bunch of delta functions, but it turns out Mathematica ...