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.
20
votes
2answers
518 views
Strange ::usage behavior in v9
Note: This is fixed in 9.0.1.
Something has gone wrong with usage in Mathematica 9. Would someone tell me how to fix it?
I define a function ...
25
votes
2answers
346 views
DeleteDuplicates not deleting duplicates
It is not surprising that DeleteDuplicates[{5,5.}] returns {5,5.} because DeleteDuplicates ...
20
votes
4answers
553 views
An apparently “simple” limit?
Let $c$ and $h$ be real values.
I was using Mathematica to compute the limit $(h \rightarrow \infty)$ of the following expression:
$$
\frac{\left(h^2 +c^2 h^2 + \sqrt{4 h^2+\left(h^2+c^2 ...
15
votes
1answer
201 views
Adding three integer sparse matrices is very slow. Adding only two is fast
Adding more than two sparse matrices in one step in Mathematica 9 is very slow (in fact I couldn't even wait for it to finish).
Here's an example. Let's generate a large sparse matrix:
...
2
votes
1answer
147 views
Misaligned DensityHistogram, DistributionAxes & PlotRange
data = RandomReal[NormalDistribution[0.5, 0.1], {10000, 2}];
DensityHistogram[data, PlotRange -> 1, Method -> {"DistributionAxes" -> "Histogram"}]
The ...
5
votes
2answers
134 views
11
votes
1answer
453 views
How to work around Mathematica hanging when showing a large SparseArray?
Note: This is fixed in 9.0.1.
In Mathematica 9, if I display any large SparseArray object in the default way (which looks something like ...
5
votes
1answer
167 views
The shortcut for Subsuperscript doesn't work?
The document for Subsuperscript says that:
To enter a subsuperscript in a notebook, use either Ctrl+_ to begin a
regular subscript or Ctrl+^ to begin a regular superscript. After
typing the ...
10
votes
1answer
249 views
Grid layout problems: different sizes when rendering on Mac and Windows
From the documentation for ItemSize:
{w,h} make all items the specified width and height
and
In Grid, w is measured in ems, and h in line heights.
This ...
10
votes
0answers
127 views
func::usage needs to be run twice?
There is an annoying problem that I can't figure out why it's happening. I have defined a usage for a my function tensorA:
...
11
votes
3answers
253 views
Suspecting bug in Parallel Framework
I've reduced my actual problem to:
ParallelEvaluate[
Module[{slot=1},
Slot[slot]
]
]
gives error messages that I think shouldn't be there. It seems I can ...
7
votes
1answer
169 views
How can I display a multigraph with different colored edges?
I'm new to Mathematica(version 9) and I'm trying to display a multigraph with different colored edges. Here's my code so far:
...
3
votes
1answer
120 views
Expectation of CauchyDistribution
I've noticed this strange behavior and I'm wondering if it's a bug.
I define a Cauchy distribution:
c = CauchyDistribution[0, 1];
If I evaluate ...
10
votes
2answers
373 views
Maximum size of TIF files in Mathematica
I have a question concerning the maximum size of TIFF files Mathematica can handle. According to the TIFF 6.0 specification -revision 6.0 (see: ...
8
votes
1answer
160 views
Cannot plot Quantity values with DateListPlot
Is there a way to use DateListPlot with Quantity values? I retrieved the following time series data from WolframAlpha:
...
7
votes
3answers
247 views
Radon function result's repeatability
I want to get a Hough transform of some edged image.
When I compare the same transformation on the same image I got different results.
...
3
votes
2answers
295 views
How to create an executable notebook in Mac OS X
All,
I am looking for help to create a notebook to be executed via terminal in MAC OSX. The notebook uses the front end.
This is what I have so far
...
13
votes
1answer
288 views
RandomVariate returns values outside the support of a PDF
Let $X$ be a random variable with pdf:
dist = ProbabilityDistribution[1/(Abs[x]*Log[Abs[x]]^2), {x, -E^-2, E^-2}]
Here are some pseudo-random drawings from it:
...
3
votes
0answers
76 views
An recurrence equation that can be solved in version 7 but not in version 8
A friend of mine showed me this code sample:
RSolve[{a[n] == a[n - 5] + 1, Sequence @@ Table[a[i] == 1, {i, 5}]}, a[n], n] // Timing
It's solved by version 7 in ...
3
votes
1answer
79 views
Discrepancy with TakeWhile between RandomInteger result and list on Linux
I have to following code that solves a problem for me. The example that is given to us is as follows:
lst = {1,-2, 3, 4,5,-3, -4, 9,7,0,8}, predicate = ...
0
votes
0answers
188 views
Mathematica 9's NDSolve treats sum as an integral [closed]
Sum and integral are threated the same by NDSolve in Mathematica 9:
The problem was also in Mathematica 7. I submitted a bugreport to the technical support, they admitted this is a bug, fixed it in ...
2
votes
1answer
265 views
Mathematica 9 behavior with derivative of a sum
In:
D[Sum[Sin[x],x],x]
D[Sum[f[x],x],x]
Out:
1/2 Cos[1/2 (-1 - Pi + 2 x)] Csc[1/2]
0
Function f is undefined, but Mathematica 9 counts it as constant?
...
8
votes
0answers
114 views
HorizontalGauge causes problem with ScalingFunctions -> “Log”
I am trying to use HorizontalGauge[Dynamic[expt], {0.1, 100}, ScalingFunctions -> "Log"], i.e. a gauge with a logarithmic scale. This creates an error, a graph ...
6
votes
0answers
111 views
Break[] inside ColorFunction
f[x_?NumericQ]:= (Do[Break[],{i,1,2}];x)
Plot[x,{x,0,1},ColorFunction->(ColorData["Rainbow"][f[#]]&)]
Break::nofwd: No enclosing For, While, or Do found ...
6
votes
1answer
497 views
What bugs have you found in mathematica 9? [closed]
Since there is no public facing bug tracker for mathematica 9, let's try keeping a list here. One potential bug per answer. Others can confirm (or otherwise) in comments to each answer.
5
votes
1answer
172 views
LogPlot axes labels destroyed when working in high precision
(I'm using Mathematica 8.)
I have a Taylor series:
poly = Normal[Series[E^x, {x, 0, 10}]]
I want to produce a log-linear plot of the error. This is easy enough ...
14
votes
1answer
1k views
Version 9 Blue Screen or Self-Test Error on Windows 7 64-bit
Update There is now an official response from Wolfram Support on this issue.
Having recently installed Mathematica version 9 64-bit on Windows 7, I keep running into Self-Test Errors evaluating ...
24
votes
2answers
499 views
Template completion
In version 8, if one evaluates
test::usage="test[x,y]";
then types test, then shift-cmd-k (or shift-ctrl-k), a template ...
3
votes
1answer
188 views
EstimatedProcess hangs with documentation example
Not sure if this is a bug or a typo but for the first example of the ARMAProcess in Mathematica 9 we have:
...
21
votes
0answers
385 views
What calendar is Mathematica using for dates in the distant past?
It appears that Mathematica treats all dates as proleptic Gregorian dates by default, a hypothesis that can be easily tested by using AbsoluteTime to compute the ...
2
votes
1answer
146 views
Problem creating MeanPredictionBands
I have a problem creating MeanPredictionBands for my function which I fitted using NonlinearModelFit. I have a complex-valued ...
8
votes
3answers
387 views
Filling between two 3D surfaces
I know it is possible to create a filling in between two curves on a 2D plot, but is it possible to do the same in 3D?
My attempt like this:
...
4
votes
1answer
78 views
Strange behavior of DateList when converting string
DateList experiences some strange behavior which i cannot explain.
This code works fine:
...
5
votes
1answer
182 views
Log-scale histogram bug
Not really a question, more a solution to what I call a bug in mathematica v8(.0.0.4). I already sent a bug report to Wolfram.
Problem
The documentation for the Histogram-function explains the ...
5
votes
0answers
160 views
Integral with HeavisideTheta takes too long to evaluate
I tried to compute $$\int_{-1}^1 d x_1 \int_{-1}^1 d x_2 \int_{-1}^1 d y_1 \int_{-1}^1 d y_2 \theta(x_1 x_2 + y_1 y_2)\,$$ where $\theta$ is Heaviside's step function, by using
...
10
votes
1answer
216 views
Incorrect means of order statistics for the standard normal distribution
Table[Mean[OrderDistribution[{NormalDistribution[], 4}, i]], {i, 1, 4}] // N
(* {-1.02938, -6.47326, 0.297011, 1.02938} *)
Above are the means of order statistics ...
27
votes
3answers
385 views
No warning when extrapolating with Plot
One of the most annoying "features" of Mathematica is that the Plot family does extrapolation on InterpolatingFunctions without ...
9
votes
2answers
211 views
How can I prevent ColorFunction from disabling antialiasing in graphics?
When I use ColorFunction, the appearance of my plots is ruined, changing from this
which has the normal smooth lines and antialiased fonts, to this
in which ...
4
votes
0answers
118 views
FinancialData property value at a given date
I was trying to get the volatility value of a specific equity on a given day.
Based on the Mathematica Help, the syntax is
...
12
votes
1answer
386 views
How to compute the inverse CDF properly?
I want to compute the CDF and inverse CDF of the hyperbolic distribution:
α = 2; β = 3/2;
x = -3;
u = N[CDF[HyperbolicDistribution[α, β, 1, 0], x], 30]
The ...
2
votes
1answer
196 views
using interpolation functions in ParallelMap
Edit
I am editing the question to give a simple workable example. It is at the bottom under the heading Example. The original question is now headed withe Background.
Background
I am trying to ...
13
votes
1answer
302 views
Adding ContourLabels changes contour colors?
I have an array s5 I want to plot using ListContourPlot
...
2
votes
1answer
94 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
363 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
129 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
172 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
697 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
272 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
146 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 ...
