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.
2
votes
0answers
64 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 ...
4
votes
2answers
102 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 ...
24
votes
2answers
383 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 ...
5
votes
1answer
60 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 ...
7
votes
0answers
79 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
83 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 ...
6
votes
1answer
58 views
10
votes
1answer
212 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
94 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
111 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 ...
7
votes
1answer
280 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
88 views
Derivatives of list elements
Could someone explain the odd behavior of the Derivative function when drawing arguments from lists? We have,
...
5
votes
0answers
76 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 ...
8
votes
2answers
132 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:
...
8
votes
0answers
122 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
138 views
11
votes
1answer
114 views
Upon PDF export, edgeless rectangles do not tile perfectly, and corners may be cut. Is this a bug?
Exporting the following as a PDF file
Graphics[{
{Red, Rectangle[{0, 0}, {1, 1}]},
{Green, Rectangle[{1, 0}, {2, 1}]}
}]
does not produce perfectly tiled ...
7
votes
1answer
71 views
ToNumberField won't recognize Root[…] as 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
119 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
100 views
Help bogged down at first query
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
113 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
69 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.
...
5
votes
2answers
121 views
Is there something wrong with VertexConnectivity
As I noticed in the documentation VertexConnectivity is defined as the following
The vertex connectivity of a graph $g$ is the smallest number of vertices whose ...
9
votes
2answers
133 views
SaveDefinitions->True changes the displayed image
I have a Manipulate[ ] that displays an image with a superimposed Locator object. It works fine when I have ...
3
votes
1answer
97 views
Something wrong with RectangleChart and Tooltip?
Currently I'm working on a diagram showing the merit order of power plants in the Netherlands. On the horizontal axes you see the cumulative power and on the vertical axes you see the costs per MWh. ...
6
votes
0answers
67 views
Mathematica 7: “LessEqual::nord:” error when using NMinimize on a real function
I encounter a problem (Mathematica 7) similar to Strategies to avoid LessEqual::nord in NMinimize? but the advised strategies don't work for me. Also, I get different results with different ...
3
votes
2answers
49 views
CommunityGraphPlot doesn't size
When I need to plot a 'large' graph with CommunityGraphPlot the output is always sized at the Mathematica default value. The Graph object itself can be resized with ImageSize option. However that ...
3
votes
1answer
133 views
BarChart and Log Scale results in different bar origins
I want to create a bar chart from two different data sets.
...
2
votes
2answers
171 views
Weird NDSolve behavior with Piecewise (MMA9)
NDSolve in Mathematica 9.0.0 (MacOS) is behaving strangely with a piecewise right hand side. The following code (a simplified version of my real problem):
...
2
votes
3answers
143 views
ParametricPlot and PlotLegends don't seem to cooperate
I noted that only part of the legend shows up in ParametricPlot using v9's PlotLegends:
...
3
votes
1answer
124 views
Sum of positive terms gives negative answer
Mathematica evaluates Sum[((n - y - 1)*(n - y)^2*n^y)/y!, {y, 0, n - 2}] as -2 e^n n. This should not be a negative value. ...
1
vote
0answers
142 views
Is this a bug in ListPicker?
I use Mathematica v9.0.1 Home Edition. I recently modified some code to take advantage of the ListPicker Manipulate control (new ...
6
votes
2answers
163 views
Why doesn't my script work when I redirect stdout?
I'm using Mathematica Home Edition 9.0.1 on Mac OS X 10.8.2.
I have this script:
...
5
votes
2answers
273 views
Exporting a .xlsx file with about 500 columns
When I want to Export["text.xlsx", data] where data is a matrix with 500 columns and 10000 rows, I get the error message:
...
0
votes
0answers
86 views
Problem when merging cells including commentary
This is a more of a problem report than a question.
When merging the two cells
Cell1:
foo
(*foobar*)
bar
and Cell2:
...
10
votes
1answer
109 views
FindInstance returns Indeterminate in version 9, but not in 8
Here is a trivial system of equations in three unknowns for which FindInstance obtains a solution:
...
6
votes
1answer
69 views
Erfc Not Returning Results Specified in Documentation
In the documentation for Erfc (under "Possible Issues"), the following command returns a number that is extremely close to 2:
However, when I run this same command in a fresh kernel, I get:
...
8
votes
2answers
143 views
Strange behavior of PlotMarkers with ListLinePlot[] and InterpolationOrder->0
I want to create a ListLinePlot with InterpolationOrder->0. However, when using plot markers like in
...
5
votes
1answer
137 views
Font size in PDF export with legended plots not working
I need to export plots as PDF with a given image and font size. Everything is working fine if there is no legend for that plot. However, if I want to export legended plots, the font size is decreased ...
12
votes
1answer
190 views
High memory use while exporting a BMP
Something mysterious is going on when exporting images. I'm using Mathematica 9.0.1 on Windows 7 (64 bit), and find that the memory use is excessive when exporting to a bmp. But it doesn't happen ...
9
votes
1answer
157 views
Precise cropping with ImageCrop
The built-in ImageCrop function "effectively removes borders from image whose pixel value distribution is almost uniform" (emphasis mine). I need an efficient ...
3
votes
0answers
79 views
Unexpected result when reading Cell with comment-lines by NotebookRead
When considering this question about re-formatting Cell (also this one), I encountered an issue which confuses me. I'll let the code itself speak:
Consider the ...
9
votes
3answers
144 views
“Stacked” BarChart with BarOrigin $\to$ Top makes y-tick marks negative
When BarChart layout is "Stacked", setting BarOrigin -> Top makes the y-axis tick marks ...
10
votes
0answers
130 views
Quiet doesn't work with FindRoot when using Brent method
The following has no solution:
FindRoot[x == 1, {x, 0.25, 0, 0.5}]
And Mathematica correctly warns us:
FindRoot::reged: The point {0.5} is at the edge of the ...
8
votes
2answers
175 views
10
votes
1answer
186 views
Forming Cone with Tube fails to work in version 9.0.1
I use two different radii in a Tube expression to draw a cone. I know for a fact that this worked in Mathematica 8, but when I reevaluated my code in versio 9.0.1
...
14
votes
1answer
413 views
Bug in Solve (Mathematica 9)
Just came across the strangest bug under both Mathematica 9.0.0 and 9.0.1. If one enters:
Solve[m == p Sin[x] && -Pi/2 < x < Pi/2, x]
... then ...
7
votes
3answers
190 views
Plotting a 3D list causes kernel to crash if x and y axes have vastly different scales
I have access to two versions of Mathematica, version 7.0.1 on Linux and version 8 on Windows. When I try the following two lines on version 7, the kernel quits when it tries to plot. In version 8 ...
7
votes
0answers
110 views
PlotMarkers doesn't inherit PlotStyle when Graphics[a] isn't a List[]
Could somebody explain, why Circle does not inherit the PlotStyle of the plot when used as ...
9
votes
1answer
232 views
Poor anti-aliasing in Rotated text with ClearType on
There is a problem on my system that occurs when text is rotated 90 degrees as it is in frame labels. This only happens when ClearType is turned on, and only around 90 degrees of rotation.
I am ...
