Greatest hits from previous weeks

11.27.2 Greatest hits from previous weeks

11.27.2.1 Even Fibonacci numbers
11.27.2.2 How do I get the inverse of a homogeneous transformation matrix?
11.27.2.3

Solving $L=\frac 3  2  \sqrt 4 \pi ^2 A^2+W^2 -\frac \sqrt 5 W \sqrt 4 \pi ^2 A^2+W^2 +6 \pi ^2 A^2+3 W^2   \sqrt 2  +\frac 3 W  2 $ for $W$

11.27.2.4 Why I get the "Set::write: "Tag Times in is Protected." error?
11.27.2.5 Elegant operations on matrix rows and columns
11.27.2.6

Boids by Simon Woods: can we re-invent further efficient flocking models to forge complexity from simple rules?

11.27.2.7 How to generate a random snowflake?

11.27.2.1 `Even Fibonacci numbers`

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=37266

Today, I found the Euler Project. Problem #2 is 
 
Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be: 
... 
[number-theory] [project-euler]

asked by xyz https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=9627 Score of 34

answered by rcollyer https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=52 Score of 47

11.27.2.2 `How do I get the inverse of a homogeneous transformation matrix?`

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=106257

I want to get the inverse of this homogeneous transformation matrix: 
 
 iab = { 
{1, 0, 0, 0}, 
{0, 0, -1, 0}, 
{0, 1, 0, 3}, 
{0, 0, 0, 1} 
} 
 
 
using the ... 
[matrix] [linear-algebra] [inverse] [geometric-transform] [rotation]

asked by andrestoga https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=37677 Score of 7

answered by march https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=29734 Score of 15

11.27.2.3 `Solving $L=\frac 3 2 \sqrt 4 \pi ^2 A^2+W^2 -\frac \sqrt 5 W \sqrt 4 \pi ^2 A^2+W^2 +6 \pi ^2 A^2+3 W^2 \sqrt 2 +\frac 3 W 2 $ for $W$`

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=57763

When I solve the aforementioned equation for $W$ or $A$ on Mathematica I get a long and ugly equation in return, namely one of the solutions for $W$ is: (attempt to read at your own health) 
 
... 
[equation-solving] [functions] [approximation]

asked by J.D'Almbert https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=19257 Score of 7

answered by Alexei Boulbitch https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=788 Score of 15

11.27.2.4 `Why I get the "Set::write: "Tag Times in is Protected." error?`

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=11868

Why I get the error below with this code: 
 
... 
[vector-calculus]

asked by Aurelius https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=1669 Score of 11

answered by Mark McClure https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=36 Score of 16

11.27.2.5 `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 ... 
[matrix] [list-manipulation] [faq]

asked by sjdh https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=515 Score of 208

answered by Mr.Wizard https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=121 Score of 70

11.27.2.6 `Boids by Simon Woods: can we re-invent further efficient flocking models to forge complexity from simple rules?`

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=312395

It has been 12 years since @simon-woods created this fascinating animation an invented a boids model which is more efficient than typical ones. Code is extremely short an elegant: 
 
... 
[graphics] [animation] [simulation] [modeling]

asked by Vitaliy Kaurov https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=13 Score of 28

answered by Craig Carter https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=12461 Score of 21

11.27.2.7 `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 Score of 153

answered by Silvia https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=17 Score of 191

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11.27.2 Greatest hits from previous weeks

11.27.2.1 Even Fibonacci numbers

11.27.2.2 How do I get the inverse of a homogeneous transformation matrix?

11.27.2.3 Solving $L=\frac 3 2 \sqrt 4 \pi ^2 A^2+W^2 -\frac \sqrt 5 W \sqrt 4 \pi ^2 A^2+W^2 +6 \pi ^2 A^2+3 W^2 \sqrt 2 +\frac 3 W 2 $ for $W$

11.27.2.4 Why I get the "Set::write: "Tag Times in is Protected." error?

11.27.2.5 Elegant operations on matrix rows and columns

11.27.2.6 Boids by Simon Woods: can we re-invent further efficient flocking models to forge complexity from simple rules?

11.27.2.7 How to generate a random snowflake?

11.27.2.1 `Even Fibonacci numbers`

11.27.2.2 `How do I get the inverse of a homogeneous transformation matrix?`

11.27.2.3 `Solving $L=\frac 3 2 \sqrt 4 \pi ^2 A^2+W^2 -\frac \sqrt 5 W \sqrt 4 \pi ^2 A^2+W^2 +6 \pi ^2 A^2+3 W^2 \sqrt 2 +\frac 3 W 2 $ for $W$`

11.27.2.4 `Why I get the "Set::write: "Tag Times in is Protected." error?`

11.27.2.5 `Elegant operations on matrix rows and columns`

11.27.2.6 `Boids by Simon Woods: can we re-invent further efficient flocking models to forge complexity from simple rules?`

11.27.2.7 `How to generate a random snowflake?`