4.42.2 Greatest hits from previous weeks

4.42.2.1 Is it possible to draw this figure using Mathematica?

https://mathematica.stackexchange.com/questions/110848/is-it-possible-to-draw-this-figure-using-mathematica

 
The figure is 
 
 
 
See the how-to video or a speeded-up GIF. 
 
I believe it should be possible to draw this figure programmatically using some Random function, but I'm rather new to Mathematica, so I  ...
 

- asked by AccidentalFourierTransform (62 votes), answered by M.R. (87 votes)

4.42.2.2 Elegant operations on matrix rows and columns

https://mathematica.stackexchange.com/questions/3069/elegant-operations-on-matrix-rows-and-columns

 
Question 
 
The Mathematica tutorial has a section 'Basic Matrix Operations', describing operations like transpose, inverse and determinant. These operations all work on entire matrices. I am missing a  ...
 

- asked by sjdh (147 votes), answered by Mr.Wizard (50 votes)