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Unanswered Questions

7,450 questions with no upvoted or accepted answers
48
votes
0answers
580 views

New Compiler Technology in V12

I am wondering whether the speed of compilation for the new compiler can be improved. Here are the results from my test. Consider the following function for generating a random draw from a gamma ...
43
votes
0answers
740 views

Hyperlinks not preserved when saving in PDF format in MMA V10

Bug introduced in 10.0 or earlier and fixed in 11.0.0 I usually create my course contracts in Mathematica and then save them in PDF format. The notebooks include hyperlinks and these have ...
40
votes
0answers
2k views

Mma 10: Half the parallel power (Macs)?

Here is a comparison of the parallel kernels launched under Mathematica under v9 and v10, on the same identical current 2014 R2-D2 Mac Pro ... [ Update: Valerio has commented that the same issue ...
38
votes
0answers
2k views

Fast Spherical Harmonics radiative transfer

This is a rather specific question and I apologize for spamming you with some lengthy code. But it could be interesting for some reader and maybe you can help out, so please bear with me. I am using ...
33
votes
0answers
882 views

Changing FrontEnd automatic scrolling in version 8

In Mathematica versions < 8, the FrontEnd has a very intelligent behavior: On evaluation, it by default automatically scrolls down the Notebook window to the last printed Output cell but also ...
32
votes
0answers
539 views

Front end goes wild with named slots

Bug introduced in 10 and persisting through 12.0.0 Assume the following simple expression {#"Test"}& Now go in front of the ...
32
votes
0answers
820 views

Performance problems in new Sequence functions

The new-in-10.1 Sequence* family of functions should provide newly optimized methods for handling sequence problems. Happily in some cases they do! For example ...
31
votes
0answers
598 views

How to design CloudObjects with reasonable CloudCredit costs

Note: I originally thought to post this as a non-answer/extended comment to this question; however I feared that I would end up hijacking the original question. It is likely a duplicate with the ...
29
votes
0answers
761 views

How to find a street pattern that fits a specific edge on a map

Cross post here I have such funny pictures: Very interesting,and you can get all of it by this code: ...
29
votes
1answer
581 views

Benchmarking: unexplained switching between high and low performance

tl;dr I am trying to accurately benchmark some vectorized operations, and compare them between systems. But benchmarking is hard to do well, and I am getting inconsistent results: performance is ...
28
votes
0answers
530 views

Is MathieuC for moderately large imaginary arguments broken?

Bug introduced in 3.0 and persisting through 12.0 (reported as CASE:3208982) I'm trying to plot MathieuC[-3,0.3,I x] for $x\in[0,10]$, and here's what I get even ...
27
votes
0answers
715 views

CPU timing for matrix rank calculation difference between 10.3 and 10.4 and 11.0

I run a small rank CPU test when new Mathematica version comes out. I noticed when version 10.1 came out that Mathematica rank calculation suddenly became extremely fast on a matrix when the size ...
27
votes
0answers
350 views

Bug in RegionMember?

Bug introduced in 10.0 and persisting through 12.0 RegionMember is new in 10.0 A commenter notes that the issue is with ...
26
votes
0answers
1k views

Kinect on Mathematica

I saw on the internet a lot of nice experiments with Microsoft Kinect. I just bought one and would like to know if someone here has been able to use it with Mathematica. The main idea is to been able ...
25
votes
0answers
1k views

Handwriting recognition with Mathematica

I am trying to teach Mathematica to read my handwriting. Since I don't want to ruin my reputation by showing my own handwriting, I am going to use a font called blackjack. Lets say this is a ...

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