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4
votes
1answer
235 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 $\psi( r)=\log(1+r)/r$. ...
13
votes
2answers
189 views

Exporting Dataset to WDX format fails

I reported this to WRI support. Tracking number is CASE:3368636 Official answer is: Thank you for contacting Wolfram Technical Support. This is a known issue and our developers are working on a ...
11
votes
1answer
113 views

What's wrong with Simplify and FullSimplify?

I have a quite complex list of equations and inequalities I combine to a boundary condition for my cost function. After investigation of two days I found the bug (I really name it a bug!). One of my ...
19
votes
2answers
518 views

Specifying non-conflicting PlotTheme options

A bug or limitation in 10.0.0 affects a few of these examples; it was resolved in 10.1.0. I am trying out Mathematica 10 on https://programming.wolframcloud.com. ...
8
votes
1answer
570 views

Importing Excel Spreadsheet containing Array Formulas

Has anyone had any success with importing an Excel Spreadsheet holding an array formula into Mathematica? The Syntax I'm using is ...
10
votes
1answer
137 views

Using Simplify on a consistent system returns False

Bug introduced in 8.0 and persisting through 10.1.0 or later It's late, but am I missing something here? Why should two independent equations, which together are consistent, ...
6
votes
1answer
88 views

Manipulate code crashes V10.1

This code is working with Mathematica 9, but Mathematica 10.1 is becomes unresponsive when I try to evaluate it. ...
10
votes
1answer
395 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 ...
12
votes
2answers
255 views

Is there a bug in AssociatePairs?

Bug introduced in 10.0 and fixed in 10.1.0 In Version 10, the GeneralUtilities package contain some useful functions. ...
3
votes
1answer
146 views

How could I upload a XLS file to Cloud and then plot it?

I want to upload a file to the Wolfram Cloud and plot the list: So I use the following code to check its head at the beginning: ...
0
votes
0answers
24 views

Undo (CTRL Z as well as under edit) bug after pressing contol shift

As some of you might know, if you press control + shift on windows, you change your keyboard layout. For example, : becomes ±. This happens sometimes in Mathematica, and it results in a weird bug: ...
3
votes
1answer
178 views

Exporting multiple arrays in a single HDF5 file in Mathematica 7

I am using Mathematica 7 and I need to export a table of data and the corresponding x and y arrays. I would like to format them ...
7
votes
1answer
68 views

Question about TransitiveReductionGraph

In Mathematica 10.0 and 10.1, according to the documentation of TransitiveReductionGraph: The transitive reduction h of a graph g is a graph that has the same ...
6
votes
1answer
512 views

Integrating over Bessel Function erroreous? (Hankel Transform)

Bug introduced in 8.0.4 or earlier and persists through 10.0.2. The Hankel Transform is given by Integrate[f[x] x BesselJ[0,x t],{x,0,Infinity}] It is ...
5
votes
2answers
131 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 ...
7
votes
3answers
199 views

Incompatibility of Row and TeXForm

Bug introduced in 9.0 and persisting through 10.1.0 or later Update: Since no one has been able to give a reason for this change in behavior or provide a solution I am tagging this as a bug. ...
5
votes
1answer
129 views

What does LinearModelFit depend on except for its arguments?

I thought this would be always true, but most likely it returns false. ...
7
votes
0answers
59 views

Floating highlighting bug [duplicate]

At some random point in time the highlighting does not disappear any more. By highlighting I mean transparent boxes appearing for find feature indicating found object, cursor highlighting once you ...
12
votes
1answer
230 views

Unwanted PlotMarkers appear at non-existent places

Bug introduced in 7.0 or earlier and persisting through 10.1.0 or later In this simple code ...
9
votes
1answer
186 views

Does InterpolationOrder cause conflicts with PlotMarkers in ListPlot?

Bug introduced in 7.0 or earlier and persisting through 10.1.0 or later My code: ...
12
votes
2answers
297 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 ...
16
votes
5answers
1k views

Mathematica gives wrong result while Wolfram|Alpha is correct

Why does Mathematica and Wolfram|Alpha give different results based upon the same code? I know Wolfram|Alpha's 7.85 is correct.
2
votes
1answer
357 views

Display a labeled multigraph

Introduced in version 9, fixed in version 10. Thanks Szabolcs for providing this screenshot showing that the bug is fixed. Despite the integration of graphs and networks, multigraphs are ...
3
votes
1answer
71 views

ConvexHullMesh sometimes excludes valid points from convex hull

I have a sequence of polytopes that I am trying to visualize, and I find that ConvexHullMesh sometimes excludes points from the convex hull, and it does so inconsistently. In particular, notice these ...
6
votes
0answers
147 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 ...
2
votes
2answers
162 views

Solving coupled first-order autonomous differential equations

I am trying to run a simulation of a circuit to observe chaotic behavior, and have obtained a set of differential equations from an analysis of the circuit. I thought perhaps I could produce a plot ...
2
votes
0answers
61 views

Transparent bitmaps in controllers. Problem with initial appearance

Bug reproduced in V10.1 on Win7 I have a problem with images with alpha channel which I want to use as labels on Button etc. Unless I scroll or move cursor over ...
4
votes
2answers
111 views

ToElementMesh problem on Ball defined by ImplicitRegion?

Could any one please confirm the following bug in mathematica 10.0.2 ? If I define this ball Ω = ImplicitRegion[0 <= x^2 + y^2 + z^2 <= 1, {x, y, z}]; and ...
1
vote
1answer
100 views

Changing the width of BarLegend with Contour argument

Bug exists in 10.0.2 Is it possible to change the aspect ratio of the BarLegend in Mathematica? The option LegendMarkerSize, ...
8
votes
4answers
363 views

Definite integral incorrectly giving a nonreal value

fixed in 10.1 (windows and Mac OS X) In Mathematica 10.0, when I enter N[Integrate[Sqrt[1+x^3],{x,-1,3}]] I get a nonreal value (i.e., the imaginary part is ...
5
votes
1answer
137 views

Simple string pattern crashes kernel

The following code crashes my Mathematica kernel (v9, MacOS): ...
5
votes
0answers
65 views

Kernel Crash while using “ValuesOnGrid” method of InterpolatingFunction

I was experiencing some kernel crash while using "ValuesOnGrid" method of an InterpolatingFunction returned by ...
3
votes
1answer
123 views

How to make sure polygon is drawn flat in 3D?

I'm working on this SE question about pentagrams on top of dodecahedron for exercising. Both solutions are basically connecting different sets of vertices of existing dodecahedron. They don't really ...
14
votes
2answers
331 views

Error “Throw::nocatch: Uncaught Throw[False] returned to top level” given each time I open a new Mathematica 10.1 session

From a few days now each time I open a new Mathematica session I get the small error messages window with the error ...
7
votes
1answer
146 views

Wrong Limit with LaguerreL

Limit[(n! LaguerreL[n,-1]/(n^(n+1/4)/Sqrt[2]/E^(n-2 Sqrt[n]+1/2))-1) Sqrt[n], n->∞] Mathematica (wrong) output ...
6
votes
1answer
125 views

Comparing exact expressions for equality — is it really OK if I get wrong answer?

I found an unexpected behavior (that I think of as a bug) in evaluation of the equality operator applied to mathematical functions with exact arguments (i.e. not containing any approximate ...
18
votes
0answers
408 views

Input Aliases in Mathematica 10

Bug introduced in 10.0.0 and persisting through 10.1.0 or later In Mathematica 9, typing in an input alias such as intt would result in the keyboard cursor ...
3
votes
0answers
47 views

Using indexed array elements as integration dummy variables with EvaluationMonitor. Bug?

As part of a routine that must cope with integration of varying numbers of dimensions, I would like to use indexed variable names (e.g., x[0], x[1],...) as dummy integration variables. However, it ...
4
votes
2answers
141 views

Transpose can't handle fractions

Related to this question, why can't Transpose handle fractions? (Note the doc pages for Transpose hasn't been updated for v10) ...
16
votes
1answer
180 views

A bug in the overloading of MemberQ and FreeQ for Association?

Bug introduced in 10.0.0 and fixed in 10.1.0. While answering Pattern match for nested Association I came across behavior of MemberQ and ...
26
votes
2answers
1k views

Save as pdf broken in version 10.0.2?

Fixed in 10.1 It looks like the save as pdf is broken after I update to version 10.0.2. The labels in the plot become a mess. Are there ways to fix it? The ...
3
votes
0answers
73 views

Unknown (internal?) function with `DSolve`

I am solving With Mathematica 10 the following ODE system: DSolve[{B'[x] == -f[x]*Cos[l]*G[x], G'[x] == +f[x]*Sin[l]*B[x]}, {B,G}, x] The solution is almost ...
30
votes
2answers
787 views

eigenvector bug?

Bug introduced in 7.0.1 or earlier and fixed in 10.0.0 I have a fairly simple $3\times3$ complex matrix, $$ M=\left( \begin{array}{ccc} \frac{7}{2}-\frac{i}{2} & -1+i & \frac{1}{2}+\frac{5 ...
4
votes
2answers
105 views
4
votes
2answers
115 views

Problem About TimelinePlot

I have some data from wikipedia. ...
20
votes
1answer
290 views

Performance regression for Fold?

Bug introduced in 8.0 and persisting through 10.1.0 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: ...
3
votes
0answers
30 views

VertexDelete not working on graph with VertexWeight

Good afternoon, I have observed an "unexpected behaviour" with VertexDelete and a graph with vertex weights. This is a minimal working example: OK ...
5
votes
1answer
74 views

Import of data from ODS

With SetDirectory["~/Downloads"]; ifile = "test.xls"; TimeConstrained[idata = Import[ifile, {"Data", 1}], 5]; I can achieve the desired result of importing the ...