6.29.1 Top new questions this week

6.29.1.1 3D Inclusion with structured mesh and coarse and arbitrary matrix

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=234780

I am wondering if there is a simple way to define a structured 3D mesh (inclusion) like e.g. that 
 
and surround it with a corse and unstructured Matrix. It should be possible to refine both more or ... 
[numerics] [finite-element-method] [mesh] [acegen]
 

asked by Max https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=68812 15 votes

answered by Tim Laska https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=61809 8 votes

6.29.1.2 Smoother jelly / water effect on an image

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=234653

I'm trying to achieve a jelly / water surface effect. I'd like it to be a bit smoother. Here I am taking a triangulated rectangle and perturbing all points by a little random noise for each frame. ... 
[image] [mesh] [textures]
 

asked by flinty https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=72682 14 votes

answered by kglr https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=125 15 votes

6.29.1.3 Can Mathematica be used to edit MP3 tags?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=234564

Can Mathematica edit mp3 tags? 
I have a set of files and I'd like to batch process artist, album title, etc. I know other tools exist; I wonder if Mathematica can do it. 
[export] [import] [sound]
 

asked by GregH https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=4393 11 votes

answered by flinty https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=72682 15 votes

6.29.1.4 How can I put the edge of a rectangle inside it rather than outside it?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=234866

Problem: when I draw a rectangle and put a coloured edge around it, the displayed edge is centred along the nominal edge and if it follows the same course as one of the axes then it does not show up. ... 
[graphics]
 

asked by ruffle https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=59886 7 votes

answered by Brett Champion https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=69 5 votes

6.29.1.5 How do I invert my matrix?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=234836

I have the following matrix $M$: 
\begin{bmatrix} 
P & p & 0 & 0 \\ 
pe_1 & Pe_1 & \sqrt{P^2 - p^2}q_1 & \sqrt{P^2 - p^2}r_1 \\ 
pe_2 & Pe_2 & \sqrt{P^2 - p^2}q_2 & \... 
[matrix] [linear-algebra]
 

asked by Anson Bdo https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=75764 7 votes

answered by LouisB https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=22158 14 votes

6.29.1.6 How to convert a Dataset into an indexed dataset / association-of-associations given a column header?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=234931

Given a dataset as such 
 
If  "letter"  is the header that is chosen, how do I convert it into an indexed dataset / association-of-associations? 
i.e. How do ... 
[dataset] [associations] [column]
 

asked by IntroductionToProbability https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=60568 6 votes

answered by Anton Antonov https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=34008 6 votes

6.29.1.7 Automatically draw chords from n-1 points on a circle to a fixed point on the circle

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=234729

I want to put n equally spaced points on a circle and automatically draw chords from all points to a fixed point preferably P(0,0). 
I have managed to draw the points and the circle so far with 
... 
[plotting]
 

asked by Guy Foxx https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=75736 6 votes

answered by kglr https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=125 5 votes