8.2.1 Top new questions this week

8.2.1.1 What in all the world is StreamPlot doing?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=262387

This really should not be hard: 
 StreamPlot[{1, 1}, {x, 0, 1}, {y, 0, 1}, StreamStyle -> {Arrowheads[.02], Darker[Pink]}] 
 
But this is the mess Mathematica turns ... 
[plotting] [bugs]
 

asked by Pirx https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=41613 10 votes

8.2.1.2 NIntegrate: the order of singular points matters!

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=262340

Consider the following integral: 
$$I = \int_{-5}^5 \frac{1}{(x(x-2))^{1/3}} dx.$$ 
The exact value is  6.30249 - 2.2405 I . I will perform ... 
[numerical-integration] [performance-tuning] [singularity]
 

asked by eigenvalue https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=77295 10 votes

answered by Michael E2 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=4999 13 votes

8.2.1.3 Ticks issue for ListLogPlot

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=262363

Consider the following plot (Mathematica 12.1): 
 ListLogPlot[Table[{x, x^-10}, {x, 1, 5}], GridLines -> Automatic, 
Frame -> True] 
 
There is a problem with ... 
[plotting] [bugs] [ticks]
 

asked by John Taylor https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=41058 9 votes

answered by Bob Hanlon https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=9362 8 votes

8.2.1.4 Wrong Graphics coordinate system after Image to Graphics conversion

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=262138

If I upload this image (originally this  img  was generated by  EdgeDetect ) by normal workflow here, this phenomenon will disappear.... 
[graphics] [bugs] [image] [implementation-details] [undocumented]
 

asked by yode https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=21532 9 votes

answered by Alexey Popkov https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=280 14 votes

8.2.1.5 How to remove the redundant ContourLabels

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=262319

... 
[plotting] [labeling]
 

asked by yode https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=21532 8 votes

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

8.2.1.6 Numerically solving the KdV equation

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=262143

Backslide introduced in 9, persisting through 13. 
 
I am trying to solve the KdV equation numerically. The following code would work perfectly in version 5: 
... 
[differential-equations] [backslide]
 

asked by gerald https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=84634 8 votes

answered by xzczd https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=1871 6 votes

8.2.1.7 Inconsistent behaviour between Active and Inactive forms of PDEs (finite element method)

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=262163

I have been using the finite element tools in Mathematica version 13.0 to solve eigenvalue problems in physics (Schrödinger equation) using NDEigensystem, but I am having some issues with non-... 
[differential-equations] [numerics] [bugs] [finite-element-method] [eigenvalues]
 

asked by user404736 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=84642 8 votes

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