6.8.1 Top new questions this week

6.8.1.1 PlusMinus definition unexpectedly affects plotting

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=222380

In version 10.1 I found a strange Plot behavior I did not anticipate.  It seems that various heads including PlusMinus are treated as wrappers and stripped by Plot in a way that is not safe.  This  ... 
[plotting] [evaluation] [symbols]
 

asked by Mr.Wizard https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=121 12 votes

answered by Mr.Wizard https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=121 12 votes

6.8.1.2 Can someone boost even more my code?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=222464

UPDATE 
 
As suggested by @Roman, I've included here all my code. 
 
I'm using just bult-in function and compile to boost my code, but I think that it can be better. My code looks like 
 
nof = 30; 
... 
[matrix] [performance-tuning]
 

asked by Magela https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=68365 11 votes

answered by Henrik Schumacher https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=38178 19 votes

6.8.1.3 Why does NMaximize miss this global maximum?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=222716

I am having trouble maximizing a function which appears as a curvature of a planar curve. 
 
{tmin, tmax} = {0, 2 Pi} 
 
f = -((6-3 Cos[t] - Cos[3 t])/((-11+6 Cos[t] + 8 Cos[2 t] - 6 Cos[3 t] + Cos[4 t]) 
... 
[numerics] [mathematical-optimization]
 

asked by A. Kato https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=62063 8 votes

answered by Michael E2 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=4999 12 votes

6.8.1.4 How to break the x axis of a plot?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=222517

I have the following data from which I get an interpolation: 
 
SPE = Interpolation[{{0, 4.08}, {0.5, 9}, {1.5, 12}, {5, 0.158}, {10, 
0.158}, {15, 0.415}, {20, 0.802}, {30, 2.64}, {40, 4.99}, {60,  ... 
[plotting]
 

asked by mattiav27 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=8822 8 votes

answered by kglr https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=125 7 votes

6.8.1.5 How to pick consecutive numbers from list?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=222407

Question is very simple. 
If we have 
 
tst = {2,3,4,6,7,9,11} 
 
 
result must be 
 
{{2,3,4}, {6,7}, {9}, {11}} 
 
 
There are similar questions, but not exact. 
 
My best solution is: 
 
myFun[arr_] :=  ... 
[list-manipulation] [sow-reap]
 

asked by lesobrod https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=5950 8 votes

answered by J. M.'s technical difficultieshttps://mathematica.stackexchange.com/landing/r/digest?cta=user&id=50 14 votes

6.8.1.6 Multiply each element of second position of two list

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=222548

If I have two list such as: 
 
list1 = {{40., 7.50551*10^-10}, {40.,7.50557*10^-10}, {40.,7.50566*10^-10}, 
{40.0001, 7.50578*10^-10}, {40.0001, 7.50591*10^-10},{40.0001, 7.50607*10^-10}, 
... 
[list-manipulation]
 

asked by John https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=72900 7 votes

answered by David Keith https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=44700 7 votes

6.8.1.7 Area/Volume of a 2D/3D object as it is filled up with water

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=222837

How could I get the volume of water on a region as it is filled up with water from below? Assume gravity points in some appropriate downward axis like -y (or -z in 3D) so the water fills upward from  ... 
[graphics] [regions] [mesh] [fluid-dynamics]
 

asked by flinty https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=72682 6 votes