7.48 January 14, 2014
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Top new questions this week:
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[Generating visually pleasing circle
packs]\url{http://mathematica.stackexchange.com/questions/40334/generating-
visually-pleasing-circle-packs}
I would like to generate a circle pack that mimics this: (don't pay
attention on numbers, and colors at all, at the moment I am interested
in circle positions and radii only)
or this:
I am new ...
- asked by VividD (23 votes), answered by Istvan Zachar (30 votes)
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[Why do certain values in ArcSin not fully
evaluate?]\url{http://mathematica.stackexchange.com/questions/40080/why-do-
certain-values-in-arcsin-not-fully-evaluate}
This is a continuation of: Why do certain fractional values in
TriangleWave not evaluate?
The analysis by R.M and rasher revealed that problem to reduce to the
behavior of:
ArcSin[Sin[Pi/ 10]]
...
- asked by Mr.Wizard (14 votes), answered by Simon Woods (14 votes)
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[More efficient way of generating list of occurrence
counts?]\url{http://mathematica.stackexchange.com/questions/40377/more-effi
cient-way-of-generating-list-of-occurrence-counts}
Given a list, e.g., target = {a, b, c, b, c, d, c, d, e, f, a, h, g}, I
want to generate a list containing the occurrence count of the
corresponding element of the target list, e.g., {1, 1, 1, 2, 2, ...
- asked by rasher (11 votes), answered by s0rce (7 votes)
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[How to avoid an expensive subset of a Manipulate computation when
dependent variables have not
changed?]\url{http://mathematica.stackexchange.com/questions/40066/how-to-a
void-an-expensive-subset-of-a-manipulate-computation-when-dependent-vari
> }
I have a Manipulate where a portion of the calculation that ends up
displayed is dependent on a subset of the Manipulate control variables.
It would make sense to cache that portion of the ...
- asked by Peeter Joot (9 votes), answered by Nasser (8 votes)
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[help to plot Poincare section for double
pendulum]\url{http://mathematica.stackexchange.com/questions/40122/help-to-
plot-poincare-section-for-double-pendulum}
I am reading a book about classical mechanics. In the chapter about
chaos, it gives the simplified and scaled equations for double pendulum
as
$$
\frac{d}{dt}\left[
\begin{matrix}
\alpha \\[3mm] ...
- asked by user1285419 (8 votes), answered by belisarius (5 votes)
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[Another difference between Set and Setdelayed. Evaluation
shortcut?]\url{http://mathematica.stackexchange.com/questions/40182/another
-difference-between-set-and-setdelayed-evaluation-shortcut}
A little while ago I wondered why
f[x_] = f[x]
gives an infinite iteration. I ended up discovering the following
difference in evaluation between Set and SetDelayed with Evaluate.
count = 0;
...
- asked by Jacob Akkerboom (7 votes), answered by Jacob Akkerboom (1
vote)
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[Arbitrary precision spline
interpolation]\url{http://mathematica.stackexchange.com/questions/40163/arb
itrary-precision-spline-interpolation}
Current implementation of Interpolation does not allow arbitrary
precision spline interpolation. Yu-Sung Chang say here that "it is not
hard to implement it manually for arbitrary precision using ...
- asked by Alexey Popkov (7 votes), answered by belisarius (3 votes)
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Greatest hits from previous weeks:
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[How can I improve Mathematica's resolution on a macbook retina
display?]\url{http://mathematica.stackexchange.com/questions/18419/how-can-
i-improve-mathematicas-resolution-on-a-macbook-retina-display}
Mathematica looks a bit fuzzy on the retina screen, how can I increase
the resolution?
Here another screenshot showing a direct comparison between the browser
and Mathematica
- asked by Tom Wellington (32 votes), answered by programming_historian
(14 votes)
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[Reconstruct text pages cut by
shredder]\url{http://mathematica.stackexchange.com/questions/32612/reconstr
uct-text-pages-cut-by-shredder}
Q1: I have a page of printed text file, but it was cut by a paper
shredder (from top to bottom). You can download all the paper fragment
here. There are some examples of them. How can I reconstruct ...
- asked by mm.Jang (35 votes), answered by Kuba (31 votes)
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Can you answer these?
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[InverseFunction
oddity]\url{http://mathematica.stackexchange.com/questions/40398/inversefun
ction-oddity}
InverseFunction[ConditionalExpression[#, 0 <= # <= 1] &]
InverseFunction[ConditionalExpression[#, -1 <= # <= 1] &]
The first line produces what I would expect:
...
- asked by Will Vousden (4 votes)
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[How to Check Spelling strings written inside input
cells]\url{http://mathematica.stackexchange.com/questions/40199/how-to-chec
k-spelling-strings-written-inside-input-cells}
Is it possible to check the spelling of strings? Strings are often used
to show messages in my user interfaces, and I would like to have an
automatic checking.
Methods that export all the strings to ...
- asked by P. Fonseca (4 votes)
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[Biorthogonal Projector Construction in
Mathematica]\url{http://mathematica.stackexchange.com/questions/40294/biort
hogonal-projector-construction-in-mathematica}
(Note: This was originally posted on SE Mathematics, but I'm reposting
it here as suggested by rm-rf, as I'm translating the theorem into
Mathematica code to test it)
I was trying to prove that the ...
- asked by DumpsterDoofus (2 votes)