6.10.1 Top new questions this week

6.10.1.1 Find second largest elements in list

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=223907

Given a list: 
 
lis = {37.21, 37.21, 37.2, 44, 44, 44, 101, 101} 
 
 
What is a simple way to extract the second largest elements? 
 
In[]:= someFunction[lis] 
 
Out[]= {44, 44, 44} 
 
 
[list-manipulation]
 

asked by Conor Cosnett https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=36681 14 votes

answered by Mr.Wizard https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=121 16 votes

6.10.1.2 The performance of AceFEM in Intel Processor VS. AMD Processor

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=224062

I am going to buy a new powerful desktop that I will use to run finite element simulations using AceFEM. I found out that the new AMD Ryzen 9 3950X obtained more points in the CPU Passmark benchmark  ... 
[finite-element-method] [acegen] [system-performance] [mkl]
 

asked by KratosMath https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=53039 8 votes

answered by marko https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=48938 8 votes

6.10.1.3 Rendering PNG images to spline curves

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=223978

I found something interesting on this page (Generic contour smoothing with shading) that could help me improve my images. Unfortunately, they can only be used with graphics generated by the software  ... 
[image-processing] [image]
 

asked by LCarvalho https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=37895 8 votes

answered by flinty https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=72682 9 votes

6.10.1.4 Parallel computing: cores vs threads

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=223899

I'm running Mathematica on a machine wtih 48 cores and 96 threads. I want to limit the number of threads the computation can have access to. If I give LaunchKernels[1] it correctly launches a single  ... 
[parallelization] [kernel-startup]
 

asked by Paolo Pani https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=73287 8 votes

answered by Mr.Wizard https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=121 9 votes

6.10.1.5 Convert ConvexHull to Inequality

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=223943

I have the following convex hull. 
 
P0={0,0,0}; 
P1={1,0,0}; 
P2={0,1,0}; 
P3={0,0,1}; 
 
ConvexHullMesh[{P0,P1,P2,P3}] 
 
 
Now I want the region algebraically as equality of the convex hull generated, in  ... 
[regions] [computational-geometry] [mesh]
 

asked by Sumit Banik https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=71940 7 votes

answered by kglr https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=125 9 votes

6.10.1.6 Multi-variable Fixed Point Iteration Command?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=223817

We want to find the zeros of a multi-dimensional function 
 
f[x_, y_] = {x + 1/4 (-Cos[x] + Sin[y]), x - y - Sin[y]/4} 
 
 
To find the zeros, we can initialize and show the iterates using FindRoot 
 
... 
[equation-solving] [functions] [numerics]
 

asked by Moo https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=36141 7 votes

answered by flinty https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=72682 7 votes

6.10.1.7 Unimport wolfram language package

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=224140

In Wolfram Language, Import["file.wl"] can import external wolfram package, Is it reversible? 
Can I unimport some packages? In other means Unset all the Function, Variable which is Set when  ... 
[packages]
 

asked by Audra Jacot https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=67051 6 votes

answered by Szabolcs https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=12 7 votes