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2
votes
1answer
76 views

Mathematica doesn't read .mat file

To be honest, I don't know if the problem is with Mathematica, or with the file; it's been generated by PicoScope, a PC-based oscilloscope software, not Matlab. The error I get in Mathematica 9 when I ...
6
votes
0answers
71 views

TimeConstrained[Delete[Range[1],1]] causes kernel crash

Run these two samples of code here (AFTER SAVING YOUR CURRENT WORK): Do[ TimeConstrained[ While[True, Delete[{1}, 1]; ];, 0.1];, {100}] ...
6
votes
1answer
142 views

Interpolation on a regular square grid spanning a triangular domain

Context I am trying to identify contours of a function which is sampled on a cartesian grid within an irregular (triangular) region. Here is the data ...
7
votes
1answer
139 views

Strange behavior of Limit in Mathematica 9 and 10 (bug?)

Consider a complex logarithm where the branch cut is defined along the negative axis. Then for $r$ and $\eta$ real and positive we can write $ \lim_{\eta \to 0} \log(-r+ i \eta) = log (r) + i \pi \\ ...
9
votes
1answer
99 views

Why are Binormal and Multinormal giving me different results when I use NExpectation?

Binormal and Multinormal can both be used to represent normal random variables: ...
5
votes
0answers
67 views

DSolve giving strange error messages solving a PDE

Consider this set of PDE $$\left( x^{2}+y^{2}\right) \dfrac {\partial u}{\partial x}+n x y\dfrac{\partial u}{\partial y}=0$$ have general solution $$u\left( x,y\right) =f\left( \dfrac {1}{n-1}\dfrac ...
4
votes
5answers
176 views

PlotLegends for ListPlot with more than 15 curves?

I'm running into trouble getting the right PlotMarkers in the legend of a ListPlot of many curves. Simple example: ...
1
vote
0answers
34 views

Reduce and roots of an irrational inequality

I use command Reduce to solve an inequality. First, I used Reduce[Sqrt[4 x + 5] - Sqrt[-6 x + 10] <= Sqrt[2 x - 1], x] and ...
0
votes
2answers
39 views

SequenceAlignment behavior

When I do: SequenceAlignment["-0.999995756767227832383453368554576431549","-0.999995756767227832383346049698547342279"] I get: ...
1
vote
1answer
64 views

Cannot import Excel (xls or xlsx) files which have non-ASCII characters in the name

It seems mma9 works fine, but with mma10 it fail to load a file name with Chinese characters. I use MacBook Pro(Retina) with OSX 10.10.2, and Mathematica 10.0.0.0. I need the file name with Chinese ...
4
votes
1answer
156 views

How do I prevent Mathematica from reformatting the expressions that I copy as LaTeX?

When I choose something that looks like $$ W_1(1)=\rho ^{5} \omega _1 \rho ^{-5}\\ W_2(2)=\rho ^{23} \omega _2 \rho ^{-23}\\ W_3(3)=\rho ^{10} \omega _3 \rho ^{-10}\\ W_4(4)=\rho ^{9} \omega _4 \rho ...
13
votes
2answers
221 views

Min, Max are slow on TimeObjects

There's something wrong with how Min and Max are implemented for TimeObject: ...
12
votes
1answer
165 views

Major slowdown when using a ColorFunction with more than one named scheme

Earlier Kuba noted a major slowdown with code Simon Woods posted. Here is a simplified example. First a color function using two different named gradient schemes: ...
2
votes
1answer
24 views

Issue with the debug tools window

I have an issue with the debug tools window. It appears on its own periodically. I have turned it off in the Evaluation menu, and have gone to "Debugger Controls" and deselected "Show Debugger Tools ...
3
votes
1answer
75 views

TabView Alignment problem for content larger than a view area

When content is larger than ImageSize of TabView then the top edge is cut off even with ...
8
votes
2answers
97 views

Pattern matching with Complex. Feature or a bug?

I have run into some strange behavior while doing some pattern matching. First, this works as expected: Exp[2 I u x] /. Exp[Complex[0, a_] u x] :> a (* 2 *) ...
3
votes
2answers
142 views

Integral does not converge (when it should)

I was looking at integrals like: Integrate[HermiteH[50, x]*Exp[-x^2], {x, 0, Infinity}] which gave me a "does not converge on $(0,\infty)$" error. On the other ...
4
votes
1answer
105 views

How to use Get on a folder

In the documentation for Get it says: If the file found by <<name is a directory, the Wolfram Language will try to ...
1
vote
1answer
43 views

FrameTicks in BarChart

I am finding it a strange issue. I want to make a BarChart as ...
4
votes
0answers
59 views

Exclusion disappears but style doesn't work

Consider this code: f[x_]:=(6 + 4 x + x^2 - x^3)/(x-2) Plot[f[x], {x, -10, 10}, Exclusions -> {2}, ExclusionsStyle -> Directive[Red, Dashed]] It produces ...
6
votes
0answers
143 views

Problem with DiscretizeRegion

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12
votes
1answer
214 views

Messages leak out from Block

When assigning message to a symbol localized by Block, I would expect that this message is not accessible outside of Block, but ...
7
votes
1answer
54 views

Testing Notebook severe slowdown with newlines

I am having a severe slowdown problem with Mathematica 10 new Testing Notebook feature (File -> New -> Testing Notebook). Please try this simple test: Now introduce some newlines and try again: ...
3
votes
1answer
91 views

OutputResponse in V9 vs V10

I have same code that works in version 9.0.1, but not in version 10.0.1.0 (according to @Sektor, it works in 10.0.0.0, too). ...
11
votes
1answer
204 views

Possible bug: Quantity[2,“meters”] returns 2 None meters

I'm using 10.0 for Linux. Trial 1: Quantity[2,"meters"] 2 None meters Trial 2: Quantity[2,"Meters"] 2 meters Trial 3: ...
4
votes
0answers
27 views

Bug? Kernel Crash on SparseArray access [duplicate]

Bug introduced in 7.0 or earlier and persisting through 10.0.2 or later The following simple code ...
3
votes
1answer
58 views

Why doesn't my expression evaluate at the subkernel?

Consider this code: ...
4
votes
1answer
142 views

Extra spaces when exporting strings into pdf (bug, linux)

Rationale: Imagine you would like to create a publication quality figure in Mathematica, from under Linux. Naturally, it will contain text/labels. Problem: Here is a simple string ...
4
votes
1answer
77 views

Strange appearance artefact in ActionMenu

I've noticed a strange thing with ActionMenu which can also be seen in the documentation for V9 and V10 on OS X. It seems that when an ...
3
votes
2answers
57 views

ReadLine[file] after reopening a closed stream doesn't read at the beginning of file?

Take a text file from your system: file = OpenRead["path/to/your/file"] ReadLine[file] Close[file] Here ReadLine[file] ...
4
votes
2answers
95 views

DeleteMissing issues [duplicate]

Has anyone had problems with the DeleteMissing function in Mathematica 10.0.2? I find that it rarely works. Most of the time it returns a list which still contains ...
10
votes
0answers
89 views

Incorrect use of Scaled causes crash

Bug introduced in 8.0 and persisting through 10.0.2 or later While playing with Scaled, I made a syntax error which caused a crash instead of an error message ...
7
votes
1answer
127 views

Compability between Graphics coordinates and shifted projections in GeoGraphics

I'd expect GeoGraphics to handle positions of points since they are provided with GeoPosition wrapper. But it is not the case ...
1
vote
1answer
44 views

LineScaledCoordinate problem for exact coordinates

Edit: Confirmed bug. CASE:2326540. Solution: Wait and use N meanwhile. I've faced this problem writing an answer for ...
4
votes
1answer
125 views

Definitions are not distributed to parallel kernels

I have a small package with utilities, which looks like that: ...
10
votes
0answers
89 views

Unexpected pattern matching behaviour: PatternSequence vs. Optional

Consider the following pattern-matching expressions: ...
4
votes
1answer
121 views

What is “MouseDragged”?

Maybe I'm picky but I don't consider static pressed button: "dragging". EventHandler[Framed[1], {"MouseDragged" :> (Print@RandomReal[])}] neither does ...
6
votes
1answer
124 views

Long running ToElementMesh with very “large” domains

I'm trying to solve a system of PDE over a large domain. This doesn't means I need to have a huge amount of mesh points and mesh elements to discretize the domain. Just that the domains has a big ...
4
votes
0answers
44 views

Extraneous reaped data with NDSolve and WhenEvent

In exploring What is the range of values $x$ for which $f(x)$ is higher than $k$ over a given domain?, I came across the following strange behavior: ...
2
votes
2answers
104 views

KeyMap on a flat Dataset (i.e. Dataset@Association)

How can I go from Dataset[<|"A" -> 1, "B" -> 2, "C" -> 3|>] to ...
2
votes
3answers
133 views

Custom Grid Lines for ProbabilityScalePlot

I'm plotting up some data using a ProbabilityScalePlot in Mathematica 8. It currently looks like so: Code: ...
0
votes
0answers
45 views

Strange behavior of AssociationMap

here is what I've searched over stackexchange I'm on windows 8.1 x64 with Mathema... 10.0.2. sometimes, Definition[AssociationMap ]=Null I found ...
6
votes
1answer
195 views

Incorrect evaluation of integral involving a DiracDelta, whose argument has infinitely many zeros

Let's say $X>0$ is a random variable with probability density $p_X(x)={\rm e}^{-x}$. Define the random variable $Y=\sin(X)$. From the transformation theorem for probabilities we know that its ...
20
votes
1answer
375 views

Excessive memory use by Mathematica kernel in 10.0.2 after executing simple commands

Warning: the code below may hang your system if you have the Suggestions Bar enabled. When issuing the following simple statements to Mathematica, it responds with a valid answer. However, ...
6
votes
0answers
96 views

One less arrow vector than asked for

Bug introduced in v10 Consider the following code: ...
2
votes
1answer
124 views

How can I make a map of Sierra Leone at the district level?

Hi I am trying to make a map of Sierra Leone and am running into trouble. SL has 4 provinces: Northern, Southern, Eastern, and Western, which are diced up into 14 districts as shown here: ...
5
votes
0answers
108 views

Instant kernel crash when using `+=` on `SparseArray` with repeated entries

Bug introduced in 5.2 and persisting through 10.0.2 or later Not sure if this is known behavior or not, but the following two lines produce an instant kernel crash (I'm using Mathematica 10.0.1 ...
5
votes
3answers
372 views

Bug in complicated Limit

The code Limit[Log[2 - Sin[x]*Cos[x]], x -> Infinity] outputs Interval[{0, Log[3]}] in Mathematica 10.0.2.0 . It should ...
4
votes
0answers
69 views

Kernel sometimes quit after second evaluation of ListVectorPlot

But introduced in 10.0.0 and persisting through 10.0.2 or later In Mathematica 10.01 Linux x386 execution of the expression ...