6.28 Tuesday, June 23, 2015

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Top new questions this week: 
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[Summer Solstice Spurious Correlations Challenge] http://mathematica.stackexchange.com/questions/86413/summer-solstice-spurious-correlations-challenge

I came across this hilarious web site that has charts of bizarre "correlations" between disparate categories. Results like this:

In the spirit of my summer solstice shedding spuriously earned rep. ...

- asked by ciao (20 votes)

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[Is there any Mathematica functionality enabling its use for the blind?]http://mathematica.stackexchange.com/questions/86538/is-there-any-mathematica-functionality-enabling-its-use-for-the-blind

A colleague of mine has become blind as the result of a sudden medical misfortune. We want to help him to feel useful and active again. We, however, still cannot determine what can be done and to what ...

- asked by Alexei Boulbitch (17 votes)

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[Nearest neighbor search in n-dimensions]http://mathematica.stackexchange.com/questions/86262/nearest-neighbor-search-in-n-dimensions

Suppose a list of items such as: L1 = RandomReal[0, 100, 1000];

I need to find the position of each k-neighbor in the original list. And very quickly if possible. As we can see, the problem is ...

- asked by Doedalos (14 votes), answered by bill s (14 votes)

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[HDF5 importing large arrays]http://mathematica.stackexchange.com/questions/86544/hdf5-importing-large-arrays

I have some computations that output a 300,000,000 element array of long unsigned ints, so about 2.4GB, in an h5 file. Mathematica handles files south of 2GB fine, albeit taking very long to import ...

- asked by Kartoffelpelz (13 votes), answered by Albert Retey (7 votes)

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[How does Rescale[] handle infinities?]http://mathematica.stackexchange.com/questions/86365/how-does-rescale-handle-infinities

Rescale appears to be a simple function. It just does a simple linear \(y = a x + b\) type rescaling of the values:

Rescale@Range[0, 10] (* 0, 1/10, 1/5, 3/10, 2/5, 1/2, 3/5, 7/10, 4/5, 9/10, 1 *)

...

- asked by Szabolcs (13 votes), answered by LLlAMnYP (5 votes)

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[How to fill the space outside of an image after rotating it]http://mathematica.stackexchange.com/questions/86528/how-to-fill-the-space-outside-of-an-image-after-rotating-it

I want to rotate this image by -50 degrees, and then fill up the black space around the rotated image with a bluish color. I can’t find any documentation/answers that suggest how to do it. (Sorry ...

- asked by George Wolfe (12 votes), answered by ubpdqn (21 votes)

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[How do I add my own help pages to the in-built Wolfram documentation?]http://mathematica.stackexchange.com/questions/86137/how-do-i-add-my-own-help-pages-to-the-in-built-wolfram-documentation

How do I add my own help pages to the in-built Wolfram documentation ?

- asked by Peter Lindsay (11 votes)

================================== Greatest hits from previous weeks: ==================================

[Where can I find examples of good Mathematica programming practice?]http://mathematica.stackexchange.com/questions/18/where-can-i-find-examples-of-good-mathematica-programming-practice

I consider myself a pretty good Mathematica programmer, but I’m always looking out for ways to either improve my way of doing things in Mathematica, or to see if there’s something nifty that I haven’t ...

- asked by Guess who it is. (352 votes), answered by faysou (323 votes)

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[How to express trigonometric equation in terms of of given trigonometric function?]http://mathematica.stackexchange.com/questions/434/how-to-express-trigonometric-equation-in-terms-of-of-given-trigonometric-functio

How can I express a trigonometric equation / identity in terms of a given trigonometric function?

using following trigonometric identities

Sin[x]^2+Cos[x]^2==1 
Sin[x]/Cos[x]==Tan[x] 
 ...

- asked by Prashant Bhate (17 votes), answered by Simon (24 votes)

================================== Can you answer these? ==================================

[Export 3D plot or Graphics3D object as stereoscopic 3D .jps file]http://mathematica.stackexchange.com/questions/86354/export-3d-plot-or-graphics3d-object-as-stereoscopic-3d-jps-file

I recently came across some Matlab code to output a 3D graph as a stereoscopic left/right .JPS file, viewable e.g. with 3D Media Viewer, Stereoscopic Player or using any 3D television or beamer: ...

- asked by Tom Wenseleers (2 votes)

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[DiscretizeRegion of ImplicitRegion too small]http://mathematica.stackexchange.com/questions/86600/discretizeregion-of-implicitregion-too-small

I have a 2D function that has some sharp peeks within the my domain. I need to find a tight region that contains these sharp peeks. The following is an example of what I would like to do.

An example ...

- asked by c186282 (2 votes)

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[Is it possible to automatically apply Parallelize when possible]http://mathematica.stackexchange.com/questions/86373/is-it-possible-to-automatically-apply-parallelize-when-possible

Parallelize in Mathematica is pretty easy to use. Most of the time, applying Parallelize to an expression, it tries to evaluates expr using automatic parallelization. Is there an option that ...

- asked by Kattern (2 votes)