6.2 Tuesday, December 22, 2015

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Top new questions this week: 
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[How to organically build up nested associations?] http://mathematica.stackexchange.com/questions/102466/how-to-organically-build-up-nested-associations

Suppose I want to construct an association of associations, such as a list of people with attributes:

peopleFacts=<| alice-> <|age->29,shoeSize->7|>, bob->  ...

- asked by Jess Riedel (17 votes), answered by Kuba (14 votes)

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[How to restart computation when kernels die?] http://mathematica.stackexchange.com/questions/102268/how-to-restart-computation-when-kernels-die

When an important process needs to be kept alive, there are monitoring tools to restart them if they die (e.g. god tasks in ruby), in my case I have an overnight scraping task that I need to have done ...

- asked by M.R. (15 votes), answered by Szabolcs (11 votes)

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[If I have a very large Popup Menu list how can I make that searchable?] http://mathematica.stackexchange.com/questions/102470/if-i-have-a-very-large-popup-menu-list-how-can-i-make-that-searchable

Imagine that you have a PopupMenu’s list that requires a lot of scrolling through the selections. Is there a way to create a control that will only display a subsection of the complete list?

- asked by Mike Honeychurch (14 votes), answered by Mike Honeychurch (14 votes)

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[Bug in RegionMember?] http://mathematica.stackexchange.com/questions/102439/bug-in-regionmember

RegionMember (new in V10) appears to have a bug. For some polygons it finds points that are clearly outside to be "members" of the region. This depends on the shape of the polygon in a way that is ...

- asked by kukako-muka (14 votes)

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[Which elements of a large array are part of a set?] http://mathematica.stackexchange.com/questions/102212/which-elements-of-a-large-array-are-part-of-a-set

I have a large integer packed array arr. My array is multidimensional, but for simplicity let’s consider 1D arrays for now. ArrayReshape takes care of the rest.

I also have a set of integers (a ...

- asked by Szabolcs (14 votes), answered by Leonid Shifrin (11 votes)

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[more numerically accurate inverse matrix] http://mathematica.stackexchange.com/questions/102261/more-numerically-accurate-inverse-matrix

I encountered the following matrix

mat = {{2, 
   2.161209223472559` + 1.682941969615793` I}, {2.161209223472559` - 
    1.682941969615793` I, 2}} 
 
 
and Inverse[mat] will give 
 
{{-0.57092 -  ...

- asked by matheorem (12 votes), answered by Karsten 7. (11 votes)

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[Stress calculations using finite elements] http://mathematica.stackexchange.com/questions/102522/stress-calculations-using-finite-elements

A standard engineering problem is to calculate stresses in a structure due to applied forces. With the inclusion of the finite element method in version 10 this question attempts to investigate how ...

- asked by Hugh (11 votes), answered by user21 (2 votes)

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

[Upgrade to Windows 10] http://mathematica.stackexchange.com/questions/89407/upgrade-to-windows-10

Can users of Mathematica on Windows 7 or Windows 8/8.1 upgrade their computers to Windows 10 a process that began today? Does Mathematica work? Are all the settings, licenses, access to files and ...

- asked by Lubos Motl (38 votes), answered by RunnyKine (32 votes)

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[How can I improve Mathematica’s resolution on a macbook retina display?] http://mathematica.stackexchange.com/questions/18419/how-can-i-improve-mathematicas-resolution-on-a-macbook-retina-display

Mathematica 9.0 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 (39 votes), answered by programming_historian (20 votes)

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

[How to avoid crashing with ConformImages?] http://mathematica.stackexchange.com/questions/102578/how-to-avoid-crashing-with-conformimages

ConformImages[] is causing a kernel crash when applied to a list of 5k images. Is there any way to apply ConformImages on the list in batches or asynchronously to conserve memory?

Here’s the ...

- asked by M.R. (2 votes)

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[Fitting real and imaginary parts of a function] http://mathematica.stackexchange.com/questions/102233/fitting-real-and-imaginary-parts-of-a-function

I have an analytic form of a function

G[w_] = -I*z0*w/(1 + I*z0*w*a)

I know this function can be obtained (up to some overall normalization) from solving a differential equation numerically for ...

- asked by Physics Moron (3 votes)

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[Reconstruct a ‘Graph‘ from a picture] http://mathematica.stackexchange.com/questions/102362/reconstruct-a-graph-from-a-picture

Actually,I post a very similar question before this.How to generate a Graph from a picture of a graph

The Dr. belisarius’s answer have accomplished it.But I find a limitation in that method:If the ...

- asked by yode (6 votes)