7.37 April 1, 2014
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Top new questions this week:
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[Creating sculptural forms using graphics
primitives]\url{http://mathematica.stackexchange.com/questions/44858/creati
ng-sculptural-forms-using-graphics-primitives}
This is a question based on this answer by halirutan.
Some amazing images can be created with this code, and I was wondering
whether it was possible to extend the principle to different shapes.
I ...
- asked by martin (16 votes), answered by Szabolcs (15 votes)
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[Making Monte Carlo simulation with
ParallelTable]\url{http://mathematica.stackexchange.com/questions/44917/mak
ing-monte-carlo-simulation-with-paralleltable}
I would like to to MonteCarlo simulations of various regressions -
basically, doing OLS under various conditions to test approaches.
On my macpro 2x 2.8 GHz quad core Xeon, 32 Gb RAM DDR2 @ 667 Mhz, ...
- asked by guylhem (14 votes), answered by Szabolcs (7 votes)
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[Bug with SparseArray selector in
Pick]\url{http://mathematica.stackexchange.com/questions/44868/bug-with-spa
rsearray-selector-in-pick}
I have created a notebook with two cells. This is the content of the
first:
g = Graph[{1 \[UndirectedEdge] 2, 2 \[UndirectedEdge] 3, 1
\[UndirectedEdge] 3, 1 \[UndirectedEdge] 4, 4 \[UndirectedEdge] ...
- asked by Adam Reith (11 votes), answered by Istvan Zachar (8 votes)
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[Image Processing: Edge detection of the tumor on tomogram. Calculation area of the tumor]
\url{http://mathematica.stackexchange.com/questions/44809/image-processing-edge-detection-of-the-tumor-on-tomogram-alculation-area-of-t}
The task is to identify the image region of the tumor.
I try to use example from documentation centre:
tom1 = Import["http://i.stack.imgur.com/mZ4fR.jpg"];
tumor = SelectComponents[
...
- asked by Alex Skudarev (10 votes), answered by halirutan (12 votes)
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[Applying non-Affine transforms to 2D polygons with
textures]\url{http://mathematica.stackexchange.com/questions/44863/applying
-non-affine-transforms-to-2d-polygons-with-textures}
I am trying to create a vanishing point perspective transformation of 2D
polygons, for example transforming the red polygon into the blue
polygon:
p1 = Polygon[{{0, 0}, {1, 0}, {1, 1}, {0, 1}}];
p2 = ...
- asked by bobthechemist (8 votes), answered by Silvia (6 votes)
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[How does Mathematica understand branchcuts of the complex
logarithm?]\url{http://mathematica.stackexchange.com/questions/44767/how-do
es-mathematica-understand-branchcuts-of-the-complex-logarithm}
Say I have the function $f(x) = x \tanh(\pi x) \log (x^2 +a^2)$ where
$a$ is some positive real number. Then it seems to be me that
Mathematica when given such a Log[] function implicitly puts a ...
- asked by user6818 (7 votes), answered by Jens (14 votes)
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[Morphological Components with periodic boundary
conditions]\url{http://mathematica.stackexchange.com/questions/44924/morpho
logical-components-with-periodic-boundary-conditions}
I would like to find the connected(with periodic boundary conditions)
components in a large binary matrix. What I've tried, and it does a fair
job is:
MorphologicalComponents[RandomInteger[{0, 1}, ...
- asked by Ali (7 votes), answered by David Carraher (10 votes)
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Greatest hits from previous weeks:
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[Resources for beautiful Mathematica
Stylesheets]\url{http://mathematica.stackexchange.com/questions/5846/resour
ces-for-beautiful-mathematica-stylesheets}
When the Wolfram Demonstrations were introduced and the
Documentation-Center was redesigned, I remember it was the first time I
thought someone had put some effort into creating a beautiful ...
- asked by halirutan (76 votes), answered by rm -rf (38 votes)
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[What is the best Mathematica tutorial for young
people?]\url{http://mathematica.stackexchange.com/questions/733/what-is-the
-best-mathematica-tutorial-for-young-people}
As Conrad Wolfram said at the TED conference, in the future kids should
focus more on new technology. Computers compute better than humans, so
we should focus more on thinking and getting the ...
- asked by noisy (31 votes), answered by Vitaliy Kaurov (17 votes)
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Can you answer these?
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[Challenge: Creating Compilable Permutations
Function]\url{http://mathematica.stackexchange.com/questions/44949/challeng
e-creating-compilable-permutations-function}
As Mathematica's implemented Permuations function is not compilable I
tried to write my very own Permutations implementation, called
PermutationsNew, which I want to compile later on. Unfortunately ...
- asked by Wizard (1 vote)
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[Notation, Format and
Interpretation]\url{http://mathematica.stackexchange.com/questions/44986/no
tation-format-and-interpretation}
I am unclear on the exact relationship between Notation, Format and
Interpretation.
Format[X] := Y seems similar to Notation[Y <= X] for formating and
Interpretation[X, Y] seems related to ...
- asked by Daniel Mahler (2 votes)
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[Speed up
MinimalPolynomial]\url{http://mathematica.stackexchange.com/questions/44763
/speed-up-minimalpolynomial}
My Mathematica code runs slowly
MinimalPolynomial[Sqrt[2] + Sqrt[3]+ Sqrt[5]+ Sqrt[7]+ Sqrt[11]+
Sqrt[13], x]
runs slowly, but the Maple version
...
- asked by user13209 (1 vote)