2.32.1 Top new questions this week

2.32.1.1 Adding Regularisation to Built-in Interpolation function

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=218764

tl;tr; How to improve performance of regularised Interpolation?

Context

Since Version 12, Mathematica now incorporates a range of (underrated IMHO) regularisation methods to Fit and FindFit.

asked by chris https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=1089 17 votes

answered by chris https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=1089 7 votes

2.32.1.2 How to model diffusion through a membrane?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=218983

This is a follow-up on How to handle discontinuity in diffusion coefficient?

Consider diffusion of \(u(t,x)\) on the domain \(x \in [0,2]\) with some simple boundary conditions such as \(u(0) = 2, u(2) =\)

asked by Szabolcs https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=12 13 votes

answered by Tim Laska https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=61809 7 votes

2.32.1.3 How to draw a "proper" tree diagram

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=218859

TreePlot[{ 
    {0 -> "Mr 1", 1/10}, 
    {0 -> "Mr 2", 2/10}, 
    {0 -> "Mr 3", 3/10}, 
    {0 -> "Mr 4", 4/10}, 
    {"Mr 1" -> "A1",  2/10 }, 
    {"Mr 1" -> "B1",  1/10 }, 
    {"Mr 1"  ...

asked by CasperYC https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=62701 13 votes

answered by Szabolcs https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=12 18 votes

2.32.1.4 How can I list all tech note pages?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=219033

It seems since v12.1 a new doc type, tech note, is included in the documentation.

However, I cannot find an index page for the tech notes. So how can I list all such tech note pages?

asked by sunt05 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=260 10 votes

answered by WReach https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=142 11 votes

2.32.1.5 Generating long binary lists fast?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=219115

Given list \(L\) consisting only of \(0\)’s and \(1\)’s, we read \(L\) backwards and construct a new list \(O\) such that: (we start with \(O=\{1\}\) and then apply the two rules:)

if we encounter \(n\) ...

asked by Vepir https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=49840 9 votes

answered by Victor K. https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=1351 5 votes

2.32.1.6 Control grain size of stipple shading

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=219020

Mathematica 12.1 introduced a number of amazing shaders such as StippleShading.

Is there a way to control the grain size of StippleShading?

On a standard resolution screen it looks like this:

asked by Szabolcs https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=12 9 votes

2.32.1.7 Extracting COVID AdministrativeDivision data from Wolfram Resource

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=218833

Wolfram makes the COVID-19 case data available in a form that is conveniently formatted for processing in Mathematica.

It can be accessed using:

data2 = ResourceData[ResourceUpdate["Epidemic Data  ...

asked by theorist https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=45215 9 votes

answered by LouisB https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=22158 7 votes