5.34 Tuesday, May 10, 2016

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Top new questions this week: 
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[Understanding evaluation and typesetting] http://mathematica.stackexchange.com/questions/114305/understanding-evaluation-and-typesetting

Background

So, one could be surprised by the fact that:

Hold @ Grid[{{1, 2}}] 
 (*or*) 
Hold @ Graphics @ Disk[]

This issue and methods of prevention are discussed in Prevent graphics render ...

- asked by Kuba (16 votes), answered by Alexey Popkov (7 votes)

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[Empty WhenEvent action crashes kernel] http://mathematica.stackexchange.com/questions/114314/empty-whenevent-action-crashes-kernel

Bug introduced in 9.0 and persisting through 10.4.1 WhenEvent is new in 9.0.

This is an example from the docs, slightly modified (action is wrapped in ), working as expected.

NDSolve[x’[t] == ...

- asked by Istvan Zachar (12 votes), answered by Istvan Zachar (3 votes)

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[Difference between = and Ctrl + =] http://mathematica.stackexchange.com/questions/114357/difference-between-and-ctrl

What is a difference between \(\textbf {=}\), and Ctrl + \(\textbf {=}\)?

For instance

there are some examples, but result is same.

and

- asked by vito (11 votes), answered by WReach (19 votes)

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[Is there a way to make links to functions in a notebook?] http://mathematica.stackexchange.com/questions/114342/is-there-a-way-to-make-links-to-functions-in-a-notebook

Frequently I’m working on a function that’s at the top of my notebook in a "functions" section, but I’m looking at the output of it in a lower "body" section of the notebook. When I want to edit the ...

- asked by YungHummmma (11 votes), answered by Mr.Wizard (11 votes)

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[Strategies to compensate for lack of multi-document interface?] http://mathematica.stackexchange.com/questions/114515/strategies-to-compensate-for-lack-of-multi-document-interface

I use Mathematica (Home Edition) to manage notes which live in a large number of different notebooks. In my case the notebooks (hundreds) are just organized using document names and file system ...

- asked by billc (10 votes), answered by Leonid Shifrin (10 votes)

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[Definition of Mod and Quotient with complex arguments] http://mathematica.stackexchange.com/questions/114361/definition-of-mod-and-quotient-with-complex-arguments

How are Mod and Quotient defined for three real/complex arguments? I wasn’t able to find the definition.

My main surprise so far when investigating their behavior is a discontinuity between real and ...

- asked by Bruno Le Floch (10 votes), answered by Chip Hurst (10 votes)

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[HighlightGraph Problem] http://mathematica.stackexchange.com/questions/114725/highlightgraph-problem

Bug introduced in 9.0 or earlier and persisting through 10.4.1

HighlightGraph does not work.

HighlightGraph[Graph[{{0, 0}, {0, 1}, {1, 0}, {1, 1}}, {{0, 0} \[UndirectedEdge] {0, 1}}], {{0, 0}, {0,  ...

- asked by ZYX (8 votes), answered by Szabolcs (5 votes)

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

[Labeling individual curves in Mathematica] http://mathematica.stackexchange.com/questions/4444/labeling-individual-curves-in-mathematica

I need to create a plot for export and inclusion in a report. Is there a better way to label curves than PlotLegends? From what I’ve read and my personal experience, PlotLegends is pretty bad.

Is ...

- asked by Tianxiang Xiong (42 votes), answered by Artes (36 votes)

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[Drawing a square root spiral] http://mathematica.stackexchange.com/questions/66969/drawing-a-square-root-spiral

Here is a start. I’m looking for a nice way to draw it.

Graphics[{EdgeForm[Black], White, 
  Polygon @ {{0, 0}, {-1, 0}, 
    Sqrt[2] {Cos[#], Sin[#]} &[Pi - (ArcCot[1])]}, 
  Polygon @ {{0,  ...

- asked by mathe (22 votes), answered by Bob Hanlon (17 votes)

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

[FrobeniusSolve: how does it work?] http://mathematica.stackexchange.com/questions/114308/frobeniussolve-how-does-it-work

Can someone suggest any reference to read? I would like to understand how the algorithm works.

- asked by Mirko Aveta (3 votes)

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[How to delete lines containing specific values from a matrix?] http://mathematica.stackexchange.com/questions/114709/how-to-delete-lines-containing-specific-values-from-a-matrix

I am doing some numerical computations and a few iterations return values that are obviously incorrect (some numerical integration problem, I suppose.). I have managed to set these values to zero but ...

- asked by Gabu (2 votes)

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[ImageSize not working correctly with Placed directive] http://mathematica.stackexchange.com/questions/114580/imagesize-not-working-correctly-with-placed-directive

It seems that having Placed inside Plot breaks the ImageSize specification:

cm = 72/2.54; 
plt = 
  LogLogPlot[Exp[x], {x, 1, 3}, 
   ImageSize -> 12 cm, 
   AspectRatio -> 0.73, 
   Frame ->  ...

- asked by leosenko (2 votes)