Unanswered Questions

44
votes
0answers
845 views

Is this 30% slowdown in Mathematica 10 due to DownValues lookup time?

Running several numerical self-programmed packages I realized already some time ago that Mathematica 10 needed between 20 and 40% more time. I did already report this of course with a simple example ...
41
votes
0answers
1k views

Numbered equations/formulas

How do you number equations in Mathematica notebooks so that they are exported correctly into latex? In case you don't know how to put numbered equations here is quick review. Open a new notebook ...
36
votes
0answers
578 views

Is this the most effective and efficient programming style for prototyping (a ray tracer) in Mathematica?

I am trying out Mathematica as a prototyping tool. As an initial exercise I have put together a brute force ray tracer, with a view to using Mathematica's built in probability distribution functions ...
35
votes
2answers
720 views

How is pattern specificity decided?

Mathematica has a notion of pattern specificity, which is a partial ordering on patterns. The rules (e.g. DownValues, ...
27
votes
0answers
674 views

What calendar is Mathematica using for dates in the distant past?

It appears that Mathematica treats all dates as proleptic Gregorian dates by default, a hypothesis that can be easily tested by using AbsoluteTime to compute the ...
26
votes
0answers
256 views

Managing Stack Exchange favorites via Documentation Center

My Stack Exchange favorites are getting bigger and bigger. It is becoming unmanageable and is getting hard to find what I look for. A related question is Sort favorite questions. Is it possible to ...
24
votes
1answer
778 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 ...
23
votes
0answers
306 views

Are greek symbols causing different evaluation?

I've updated today to Mathematica 9.0.1.0 from version 8 and found something that absolutely confuses me. Let us define a piecewise function: ...
21
votes
0answers
474 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 ...
19
votes
0answers
282 views

How to perform document classification (i.e. extracting topics from text)?

I need to build a multi-label text classifier. There are a bunch of techniques for doing this, and it's called automatic document classification. I'm trying to use the EM technique (expectation ...
19
votes
0answers
378 views

Version 10 cannot print properly?

Update Not fixed in version 10.0.2 I have two problems with printing in version 10. First, I can't print correctly with a setting of printing scale For example, I have some plots in a notebook, ...
18
votes
1answer
712 views

Save as pdf broken in version 10.0.2?

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 Export function works ...
18
votes
0answers
716 views

How would I improve this Karaoke machine code?

I was looking at a large collection of Import/Export user suggestions the other day and it dawned on me that we finally have MIDI import in Mathematica 9, which is rather interesting since MIDI ...
17
votes
0answers
320 views

Input Aliases in Mathematica 10

Bug introduced in 10.0.0 and persisting through 10.0.2 or later In Mathematica 9, typing in an input alias such as intt would result in the keyboard cursor ...
16
votes
0answers
179 views

A documented syntax of FileNames doesn't work?

bug present as of 10.0.2 According to the documentation for FileNames: However when I attempt to use this syntax I get an error: ...

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