Unanswered Questions

42
votes
0answers
657 views

Is it possible to customize the Suggestions Bar?

I'd like to be able to customize the Suggestions Bar in v9.0 to provide recommendations of my own. Possible example: when doing unit calculations, I'd like it to suggest converting the answer to ...
36
votes
0answers
1k views

How to construct a treemap using non-rectangles?

I've written the standard version of a tree map (a graphic that shows nested data) and I'm looking to improve on this layout by switching to different types of polygons or perhaps circles. Can anyone ...
33
votes
0answers
523 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 ...
26
votes
0answers
357 views

Why is StringExpression faster than RegularExpression?

Edit: as noted by Albert Retey the performance difference is only seen when sub expression extraction is performed. If this test is used below the timings are similar: ...
25
votes
0answers
473 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, ...
23
votes
0answers
522 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 ...
23
votes
1answer
481 views

Is it safe to launch/close kernels in the middle of a parallel calculation?

It appears that it is possible to launch additional kernels (or close existing ones) during a parallel calculation. The newly launched kernels will be utilized for the rest of the calculation. ...
20
votes
0answers
149 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 ...
19
votes
0answers
227 views

Why does list assignment with a packed array result in unpacked values?

This is another question on the design choices in Mathematica. I understand that without direct reply from the developers it may not be possible to give a definitive and exhaustive answer to "why" ...
19
votes
0answers
413 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 ...
17
votes
0answers
484 views

Cheat sheets or reference cards for Mathematica

In order to improve my workflow with Mathematica, I'm looking for cheat sheets. The purpose of such reference cards is to be printed and to stay on the desk during the learning of a new programming ...
17
votes
0answers
2k views

Simplify matrix algebra

I'm trying to simplify some matrix linear algebra, for example, simplify $$\big(a1\times(A1\cdot A2)\big)\cdot\Big(a2\times A3\cdot A4+(a3\times A5)\cdot(a4\times A6)\Big)^{T}$$ where lower case ...
16
votes
0answers
599 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 ...
15
votes
0answers
143 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: ...
15
votes
0answers
242 views

How can I make a notebook with two column layout?

How can I make a notebook with two column layout? Is it possible? I saw something tools could do such thing? Author Tools?

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