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9
votes
0answers
157 views

Wrong Cashflow of Annuity with initial payment

Bug intoduced in (8.0?) persisting through version 11.0.1 If we use TimeValue to look at the PV of an Annuity with initial ...
9
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0answers
152 views

Is there a documentation generator for Mathematica?

I'm looking for a way to document the functions of my packages inline, preferably inside comments. There should be a Doxygen type tool for this that takes comments and that generates html from markup ...
9
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0answers
113 views

Graph: PropertyValue changes and Dynamic

I almost never work with Graph in Mathematica but lately I helped someone with it. For this, I tried to make an animation using ...
9
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0answers
193 views

Bug in PositiveDefiniteMatrixQ?

Fixed in 10.1.0. Exists in at least 9.0.1 -- 10.0.2. This seems like a bug in PositiveDefiniteMatrixQ to me: ...
9
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0answers
157 views

How can I obtain the absolute settings of some Grid options?

For example: Grid[{{10!}, {5!}}, ItemSize -> Full, Frame -> All] What's the real value of Full? How can I map the <...
9
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0answers
224 views

How to add big data into a CDF file, without it being loaded into memory

I have 1 GB of data that I would like to add to a CDF file, but I would like to avoid it being loaded into memory when someone opens the file (Free Player). One gigabyte of info takes a lot of ...
9
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0answers
848 views

Does Mathematica use the Elliptic Curve Method (ECM) in FactorInteger[]?

I'm not a mathematician, and I'm not even going to pretend that I understand anything of the ECM. But I know it can be a fast method for factorization. I benchmarked the factorization of $$...
9
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0answers
647 views

Using Mathematica as a data visualization front end for .Net applications?

I have a C# application that has 3-dimensional data that I wish to plot. Controls in C# for surface modeling are, in my experience, rather limited. I wish to have my C# application send the 3D point ...
8
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0answers
53 views

Probable bug in EdgeAdd when adding edges to multigraphs

Bug introduced in 10.0 or earlier and persisting through 12.0 M10.0.2 and M10.3 return a wrong result without errors. M11.0 and M12.0 issue a flood of messages and sometimes crash. I am using ...
8
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0answers
94 views

How to modify NDSolve`StateData without crashing the kernel?

Probably a hard question, but it's better to cry out loud. Reminded by Chris K, I noticed my fix function has been broken since v11.3. After some checking, I ...
8
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0answers
220 views

DEigenvalues and NDEigenvalues return different values

In the following example, DEigenvalues and NDEigenvalues return different results despite having identical arguments. Does anyone know why? (I use Mathematica 11.3) ...
8
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0answers
70 views

Design Patterns for System Functions?

Using PrintDefinitions give one a great view into many system functions. Often the design of these symbols incorporate multiple patterns that I see again and again. ...
8
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0answers
101 views

Is anything missing from Wolfram Development Platform?

I wanted a license for Mathematica that allows commercial use (as a single user). After doing an awful lot of reading at the Wolfram website, I decided to purchase the Developer license for Wolfram ...
8
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0answers
135 views

How to overwrite key shortcuts?

It is very handy to have shortcuts for frequently used glyphs, e.g. [[, ]], <|, ...
8
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0answers
113 views

StableMarriage vs. FindIndependendEdgeSet: How to use the procedure FindIndependendEdgeSet as a Gale-Shapley algorithm?

From Help, the procedure StableMarriage was an element of the Combinatorica, but it is available in the built-in ...
8
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0answers
59 views

Performance warning using TakeList and All on big lists

According to Mathematica's own documentation, TakeList can operate with lists containing All. For example: ...
8
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0answers
47 views

Dealing with over eager shadowing messages

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8
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0answers
86 views

Current $Context of a given notebook

nb = CreateDocument[{Dynamic@$Context}, CellContext -> Notebook] It will show Notebook$$22$93500` or something similar. How ...
8
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0answers
107 views

Slow down training many neural networks (Bug?)

I am working on something in which I need to train a neural network many times with slightly different training data. I noticed that after many training runs the input rate had dropped significantly. ...
8
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0answers
45 views

Styles inheritance stack for elements of a Graphics/GraphicsBox

You can skip to the bottom if you only care about the question. My original goal was to control FrameLabel color from a notebook level opposed to doing it ...
8
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0answers
100 views

Matrix-free Arnoldi method for eigensystems

I am solving a generalized eigenvalue problem $$\mathbf S\,\mathbf x = \lambda\,\mathbf M\,\mathbf x$$ w/ $\mathbf S := \mathbf B\,\mathbf A^{-1}\,\mathbf B^{T}$, and $\mathbf A$ is a sparse ...
8
votes
0answers
94 views

What is the philosophy behind \[Rule] (a.k.a. `->`) for assigning options?

Today I was banging my head against my desk when I realized that the problem I was experiencing was due to having typed ImageSize[Large] instead of ...
8
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0answers
71 views

Adding a new GeoProjection?

The documentation for GeoProjectionData gives a list of supported GeoProjections. I was not able to find any documentation on ...
8
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0answers
128 views

How to run GrammarApply offline?

It is a question regarding formal grammar. I have a grammar rule addition as below:- ...
8
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0answers
163 views

FindShortestTour causes kernel crash

I have contacted support, CASE:4075709 UPDATE I have received reply from wolfram support. They have confirmed that this is indeed a bug. There are lots of sets of data that can cause the Kernel to ...
8
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0answers
131 views

What is the point of PaneSelector?

Intro PaneSelector looks like a pretty idiomatic way to toggle displayed content e.g.: ...
8
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0answers
93 views

ListPlot does not plot Labeled data under some conditions

I don't understand the following behaviour I'm seeing with ListPlot and Labeled. It seems like a bug to me, but I'm wondering if ...
8
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0answers
104 views

What do the Internal`Compare* functions do?

As part of looking at this question I dug into Names["Internal`*Compare*"] and ended up with: ...
8
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0answers
382 views

How was this beautiful textbook created? Where's the stylesheet?

UPDATE: The video presentation on how this was carried out by the author is given at the following link: http://www.wolfram.com/broadcast/video.php?c=88&v=185 I am really impressed by the way ...
8
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0answers
149 views

Remote kernels, Neural Networks and formatting of Dynamic content

Bug fixed in 11.2 I have a few GPU/CPU 'loaded' Linux boxes in my lab, used largely for rendering. I want to compare the new 11.1 Neural Network stuff to some Tensorflow things we do here. Of course, ...
8
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0answers
85 views

How can I plot a region parametrized by another region?

I am trying to learn how to describe and plot a 2D-region for $x_1$ and $x_2$ based on / parametrized by another 2D-region for $v_1$ and $v_2$. In the following example, the region ...
8
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0answers
111 views

Fast find sublist in a list procedure (for packed arrays of integers)

I want to find a first position of sublist inside a list, where both lists are packed arrays of integers. A typical ...
8
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0answers
368 views

What are the software requirements to train neural networks on GPU?

It seems that GPU training in Mathematica has some additional requirements on the software. For example, when I run this example on a Linux system, I get the following errors ...
8
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0answers
289 views

Best Wolfram tool for interactive web-based calculator

A colleague is considering re-implementing this online "Photon Propulsion Calculator" using a Mathematica-based product. I wanted to ask the community which product would be best. WebMathematica ...
8
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0answers
261 views

ContourPlot problems

What's the issue here? The following code ...
8
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0answers
143 views

KeyValuePattern specificity in DownValues

Bug introduced in 10.4.0 and persisting through 11.3.0 CASE:3824590 [...] Developers are discussing this behavior. [...] I will let you know when I have definite information on this. [...] ...
8
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0answers
401 views

FEM Mesh for pipes and tubes

I work with pipe systems and would like to use finite elements within NDSolve for regions inside or exterior to a pipe. How to do I make a mesh of the region ...
8
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0answers
114 views

Mathematica 11.0.1 hangs calling InputForm[r] when “;” is missing in above line

This one is really strange. Mathematica just hangs when I call InputForm[r] where r happened to be the solution obtained from <...
8
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0answers
194 views

Using EntityStore and related functions in a NoSQL-database scenario

In a lot of engineering tasks one ends up with massive amounts of .txt or .csv files from various measurement systems (oscilloscopes, temperature probes etc.) that usually end up on a local or central ...
8
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0answers
96 views

Unique[] problems

A fresh Mathematica session with $Version "11.0.1 for Microsoft Windows (64-bit) (September 20, 2016)" produces the following results. ...
8
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0answers
75 views

Implementing custom audio filters that work on file-backed Audio[] objects

Audio supports out-of-core processing. We can create a file-backed Audio object using au = Audio[File[...]]. Any filters ...
8
votes
0answers
757 views

VectorPlot3D broken in Mathematica 11.0.1?

Here is what I get when simply evaluating the example in the documentation: This is on Win7 x64. I can see some vectors if I do something like ...
8
votes
0answers
132 views

Relation between the syntactic and evaluated Association

This question is inspired by this answer and related to unsolved post "Association's Attributes change between 10.3.1 & 10.4"...
8
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0answers
140 views

About efficiency of modifying large list in place

In Wagner's book "Power Programming with Mathematica" page 303. Wagner metioned do not "modify large list in place" He take two example ...
8
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0answers
55 views

Unexpected behavior when using multiple MeshFunctions; definitions not kept isolated from each other

I was trying to devise an answer to this question that relied entirely on MeshFunctions to do all the work, but I ran into some unexpected behavior. Consider two ...
8
votes
0answers
339 views

Use of new machine learning capability for search problems (reinforcement learning)

I work with search algorithms, often of an adversarial nature, and want to understand how to apply Mathematica's machine learning capabilities, especially those new in version 11, to this type of ...
8
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0answers
129 views

How to get DensityHistogram bins like GeoHistogram bins?

Version 11 introduced GeoHistogram. It creates bins that align the edges with certain shapes. DensityHistogram can also use ...
8
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0answers
169 views

How to correctly CloudDeploy code which contains non-English characters?

As an illustration: CloudDeploy[{"中文"}] will give a url. After open it, I got following on the web page {\:4e2d\:6587} ...
8
votes
0answers
152 views

ImageSize bug in Rasterize

Bug introduced in 8 or earlier and persisting through 11.2.0 In version 11.0.0 I am getting incorrect sizes from Rasterize. The problem remains in 11.0.1 ...
8
votes
0answers
368 views

Expansion for Modified Bessel Function Around Infinity

I'm somewhat new to Mathematica, and I don't understand why I'm getting inconsistent series expansions for the modified Bessel Function of first kind near $x=\infty$. First problem: I get different ...

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