This tag is reserved for questions where the problem has been vetted by this community and the observed behavior is confirmed to be a bug. Please do not use this tag for new questions.
13
votes
1answer
320 views
Adding ContourLabels changes contour colors?
I have an array s5 I want to plot using ListContourPlot
...
2
votes
1answer
95 views
Using bin values and metadata in ChartElementFunction in histograms
The DensityHistogram command lets you specify a ChartElementFunction which according to the documentation:
The arguments ...
4
votes
1answer
364 views
Nonsense Data with Wolfram Alpha + Mathematica?
I am trying to learn how to interface with WolframAlpha. When I try using the Mathematica interface I get nonsensical data. I don't know if this is a bug or if I'm doing it wrong.
My goal is to ...
2
votes
1answer
133 views
Customizing FrameTicks in DistributionChart
So I have been fighting with this for a while. I'm trying to get custom frame ticks on both the left and right side of a DistributionChart. It's not going very ...
10
votes
1answer
176 views
Why do Arrowheads interfere with ImagePadding?
In a recent posting, Belisarius solved a problem related to the display of arrows on the x and y axes by setting ImagePadding->None.
My question is: why do the ...
20
votes
6answers
715 views
ColorData[“VisibleSpectrum”] is wrong?
I am trying to visualize the visible spectrum using the built-in ColorData["VisibleSpectrum"] function which "colors based on light wavelength in nanometers". But I ...
4
votes
1answer
286 views
RevolutionPlot3D of 4 piecewise functions around X-axis crashing mathematica
I'm trying to rotate 4 piecewise functions around the X-axis using RevolutionPlot3D.
The 4 functions I have are:
...
2
votes
2answers
150 views
Import[] bug (video)?
I have the following code:
frames = Import["myvideo.avi",{"Frames",{50,60,70}}];
This imports frames 1,2, and 3 of the video, not 50,60 and 70. It imports the ...
13
votes
1answer
208 views
Problems with images caused by which stylesheet is used
Update
This looks now like it was a bug in Mathematica version 8, because
everything works as expected - at least for this minimal example - in
version 9. (As an aside, I couldn't seem to find ...
3
votes
1answer
99 views
Using EdgeList on a once empty Graph crashes the kernel
Calling EdgeList on a non-empty graph which was previously empty causes the math kernel to crash.
For example,
...
2
votes
0answers
284 views
Simple contour integral with a parameter gone wrong
I run into the following problem, I tried to evaluate a very simple integral:
Assuming[ a > 0 , Integrate[Sin[a*s]/(s - I)^2, {s, -Infinity, Infinity}]]
...
3
votes
0answers
146 views
Unexpected behavior of GeometricTransformation
I have the following mapping on the complex plane:
$$
z \mapsto \tau \mu z-1,
$$
where $\mu$ is complex, $\tau$ is real number. I want to draw the image of left unit semidisk and play with $\tau$.
...
13
votes
1answer
396 views
Unique[] symbol not properly tracked
In a nutshell, why does this work (change y and see how the value updates)
...
8
votes
1answer
124 views
Formatting Framed - some FrameStyle graphic directives don't work?
The FrameStyle option in Framed seems to work for some graphics directives but not others, eg:
Framed["yo", FrameStyle -> Blue]
But
...
4
votes
0answers
169 views
Incompleteness of FindInstance
I've been playing around with Resolve and FindInstance. I know that Resolve should always ...
12
votes
1answer
237 views
Extra factors appear when evaluating Euler integrals
When I perform the double integral in Mathematica,
Integrate[(x (1 - x))^z (y (1 - y))^z, {x, 0, 1}, {y, 0, 1}]
which should give
$$B(z+1,z+1)^2 = ...
10
votes
2answers
403 views
Interpolation of mostly-structured 3D data
this question relates to interpolation of 3D data and Improved interpolation of mostly-structured 3d data
I have an irregular 3d data set that is quite large (around 70,000 triplets---let's call it ...
9
votes
1answer
100 views
DateList not using current year when a year is not specified
According to the documentation when using DateList but not giving it a year it should use the current year. It is not doing that for me. Instead it uses 1900. ...
7
votes
5answers
239 views
TableAlignments->Left not working
For a very simple dataset TableAlignments->Left does not work:
...
4
votes
1answer
299 views
10
votes
5answers
264 views
How do you change the font size of a Manipulator label?
I have a stand alone Manipulator (it is not in a Manipulate) and would like to know how to alter the style of the label. There ...
8
votes
1answer
105 views
9
votes
1answer
171 views
Error Using Sow in DensityHistogram with ColorFunction
To find the color values used in a plot, I was using Sow as shown here:
...
10
votes
1answer
170 views
Issue with PathGraph
I am having a strange issue with PathGraph. Executing
PathGraph[{a, b, c}]
or ...
6
votes
1answer
148 views
DistributeDefinitions not working for compiled functions
This is fixed in Mathematica 9.0.0.
I'm having trouble with parallel evaluation of compiled functions. Here is a simple example illustrating the problem:
...
10
votes
2answers
223 views
19
votes
2answers
791 views
Debugging memory leaks
I've written my incredibly complex, incredibly elegant analysis function, that works great on small test data. But when I run it on my real (bigger) data set it keeps running out of memory. It turns ...
14
votes
1answer
220 views
Why does LogLinearPlot sample its argument outside the specified domain?
I experience a weird bug in the function LogLinearPlot. If the input is an interpolation function, such as the one created like this,
...
15
votes
2answers
333 views
Exporting a dashed plot with a color gradient to a vector graphics format ruins the dashing
When exporting a dashed plot with a color gradient to a vector graphics format such as EPS or PDF, the dashing is partly ruined. For example, this command:
...
14
votes
2answers
410 views
Pattern issues weird warning
Take for example
head[b_[PatternSequence[_, _]]] := 9
I know this example serves no purpose as is. It also happens in useful examples such as
...
12
votes
1answer
143 views
NExpectation behaves oddly with EmpiricalDistribution
My question concerns the usage of NExpectation and Expectation and why I see the behavior I see in the following example.
First ...
15
votes
1answer
323 views
When importing GIF animation, how to find the correct list of “DisplayDurations”?
When importing GIF animations with variable frame durations, the settings for "DisplayDurations" are not recovered correctly. As an example, I'm using the movie from this earlier question:
Here I'm ...
13
votes
3answers
909 views
Mathematica script - passing command line arguments
When using Mathematica script
#!/usr/local/bin/MathematicaScript -script
Print[$ScriptCommandLine]
and running it with some arguments:
...
5
votes
2answers
202 views
Create self-contained plots when Ticks or FrameTicks require external functions
Let's say I define tick marks for a plot in a separate function outside of the plot:
...
8
votes
1answer
245 views
Random variables with transformed discrete distributions cannot be applied to Probability[] function?
I have two discrete uniform distributions over same support:
Dx = DiscreteUniformDistribution[{-8, 8}];
Dy = DiscreteUniformDistribution[{-8, 8}];
I use ...
8
votes
1answer
384 views
GeoDirection and GeoDistance Memory Leaks: How to Recover the Memory?
The functions GeoDirection and GeoDistance have memory leaks. To see this, run the example functions below and watch as the Physical Memory Available in the Windows Task Manager, Performance tab, ...
6
votes
1answer
299 views
Dialog crashes Mathematica
I have some dialog windows in a GUI of which one regularly crashes the kernel. I managed to focus on this particular piece of code, though I don't really know what causes the crash:
...
14
votes
3answers
360 views
Memory Leak in Frontend - anyone know a workaround?
When using Rasterize on a Graphics expression composed of many differently coloured Graphics objects memory is allocated in the frontend which is then not released or reused when a similar graphic ...
8
votes
2answers
669 views
17
votes
1answer
314 views
How to fix broken InterpolatingFunction?
I have an InterpolatingFunction based on irregularly-gridded data, like this:
...
18
votes
1answer
404 views
Transferring a large amount of data in parallel calculations
This question is inspired by one of @whuber's answers
Consider the following code:
...
12
votes
1answer
217 views
Effects of single-point and multi-point calls of Point on plot range
Several Graphics primitives are listable. For instance, Point accepts lists of coordinates so that multiple calls to Point are ...
15
votes
2answers
629 views
Why does Mathematica give the wrong answer when integrating?
I integrate
Integrate[Exp[I Cos[b - c]] Cos[b], {b, 0, 2 Pi}]
Mathematica gives:
2 I Pi BesselJ[1, 1]
Which is indepedent ...
2
votes
1answer
143 views
VertexLabelStyle not found in Mathematica 8.0.0.0
I tried to use VertexLabelStyle, but seemed not recognized in my system with version number 8.0.0.0. Is this expected or I have missed something? From the online ...
3
votes
1answer
157 views
Avoid crash in recursive Dynamic
With the following Dynamic cell, I can reproducibly crash Mathematica, so do not try this unless you have saved all your work!
...
4
votes
1answer
279 views
Invisible \[Conjugate] glyph in the linux frontend
I have a very annoying problem.
The Conjugate glyph (*) does not show when I type.
That is, if I type \[Conjugate] or ⋮co⋮ then ...
4
votes
0answers
160 views
NullSpace[_, Method->“OneStepRowReduction”] is sometimes wrong; how can I work out when this happens?
(This is on MMA 7.0.1.0 on OS X)
I've just found a large matrix m for which NullSpace[m] and ...
5
votes
1answer
125 views
Bug in LengthWhile?
Is this a bug or my MMA went insane or I'm missing something?
LengthWhile[Reverse@IntegerDigits[1000], # == 0 &]
works fine, but with SameQ instead of Equal, ...
10
votes
2answers
169 views
How to Write into multiple files?
I want to put expressions into multiple files simultaneously, with the following code:
...
7
votes
4answers
237 views
Unexpected behavior from GatherBy in version 7
I have come across what appears to be a bug in GatherBy. It appears similar to the problem of using Table[Random[], {1000}] in ...
