7.24.2 Greatest hits from previous weeks

7.24.2.1 How to generate a random snowflake
7.24.2.2 How to make an inkblot?
7.24.2.3 Figuring when the minute and hour hand coincide on a clock
7.24.2.4 Plotting Complex Quantity Functions
7.24.2.5 How to express trigonometric equation in terms of of given trigonometric function?
7.24.2.6 How to plot an ellipse?
7.24.2.7 Elegant operations on matrix rows and columns
7.24.2.1 How to generate a random snowflake

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=39361

'Tis the season... 
And it's about time I posed my first question on Mathematica Stack Exchange. 
So, here's an holiday quest for you Graphics (and P-Chem?) gurus. 
 
What is your best code for generating ... 
[graphics] [random] [simulation] [generative-art]
 
asked by Peltio https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=6745 143 votes
answered by Silvia https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=17 182 votes
7.24.2.2 How to make an inkblot?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=3345

How to effectively create a polygon that looks like a realistic inkblot? So far, I could come up with this (borrowing from Ed Pegg Jr.'s Rorschach demonstration): 
 
... 
[graphics] [performance-tuning] [image-processing] [generative-art]
 
asked by István Zachar https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=89 86 votes
answered by Sjoerd C. de Vries https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=57 51 votes
7.24.2.3 Figuring when the minute and hour hand coincide on a clock

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=573

I would like to list all possible times in a 12-hour period, where the hour hand overlaps the minute hand completely.  This is really a question about three distinct things - to be done in Mathematica ... 
[equation-solving]
 
asked by Steve D https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=191 16 votes
answered by Verbeia https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=8 21 votes
7.24.2.4 Plotting Complex Quantity Functions

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=3458

Trying to plot with complex quantities seems not to work properly in what I want to accomplish. I would like to know if there is a general rule/way of plotting when you have complex counterparts in ... 
[plotting] [complex] [faq]
 
asked by night owl https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=116 43 votes
answered by Artes https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=184 29 votes
7.24.2.5 How to express trigonometric equation in terms of of given trigonometric function?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=434

How can I express a trigonometric equation / identity in terms of a given trigonometric function? 
 
using following trigonometric identities 
 
... 
[functions] [trigonometry]
 
asked by Prashant Bhate https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=99 30 votes
answered by Simon https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=34 37 votes
7.24.2.6 How to plot an ellipse?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=20100

I'm new to Mathematica, and I'm finding it difficult to plot an ellipse. 
I tried using 
 
 Plot[(x/5)^2 + (y/3)^2 == 1, {x, -5, 5}, {y, -3, 3}] 
 
 
but I'm getting ... 
[plotting]
 
asked by Sriram https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=6075 18 votes
answered by Jens https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=245 30 votes
7.24.2.7 Elegant operations on matrix rows and columns

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=3069

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 ... 
[list-manipulation] [matrix] [array] [faq]
 
asked by sjdh https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=515 186 votes
answered by Mr.Wizard https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=121 62 votes