8.28.1 Top new questions this week

8.28.1.1 What happens if you don't Reap what you've Sown?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=272758

As I understand it, when using  Sow[expr]  you throw the  expr  on some private stack which you can ... 
[memory] [implementation-details] [sow-reap]
 

asked by Gert https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=27889 Score of 15

answered by Leonid Shifrin https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=81 Score of 17

8.28.1.2 1D diffusion problem: Troublesome NeumannValue

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=272601

Mathematica solves the diffusion problem (two Neumann-conditions) 
... 
[differential-equations] [bugs] [finite-element-method]
 

asked by Ulrich Neumann https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=53677 Score of 8

answered by user21 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=18437 Score of 4

8.28.1.3 Rotating 2D graph like if it were in 3D

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=272777

I want to rotate graph plotted in 2D like if it were in 3D - around any axis  x, y, z . 
The following code allows me to rotate only inside ... 
[graphics] [graphs-and-networks] [graphics3d] [style]
 

asked by azerbajdzan https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=53172 Score of 7

answered by Jean-Pierre https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=72509 Score of 8

8.28.1.4 Deletion of string characters by rule

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=272743

This seems simple: 
Given 
 lis = {"abcd12efcdef"} 
 
I would like to delete all instances of "ef" when it directly follows a digit character, to ... 
[string-manipulation]
 

asked by Suite401 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=42475 Score of 7

answered by Roman https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=26598 Score of 8

8.28.1.5 Extraction of sublists from a list

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=272663

I have a list consisting of strings and numbers, from which I need to extract sublists. 
... 
[list-manipulation]
 

asked by Suite401 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=42475 Score of 7

answered by Bob Hanlon https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=9362 Score of 6

8.28.1.6 How can I plot this figure?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=272682

I have the formula, the renyi entropy $\frac{1}{1-q}ln(\sum_{i=1}^Np_i^q)$, and the figure I haven't seen before, is it the ContourPlot for N=3 (the condition is $0\le p_1\le1,0\le p_2\le1,p_1+p_2+p_3=... 
[plotting]
                                                                                  

                                                                                  
 

asked by KarryMa https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=63769 Score of 7

answered by cvgmt https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=72111 Score of 11

8.28.1.7 NDSolve doesn't work even though DSolve does

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=272653

I'm trying to solve a differential equation. Using the following code 
... 
[differential-equations]
 

asked by Nickesponja https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=87969 Score of 7

answered by Michael E2 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=4999 Score of 4