7.41.2 Greatest hits from previous weeks

7.41.2.1 QR Code in shopping cart handle

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=26268

This week, the market people from my work wanted to put QR codes in shopping cart handles, but when they tested it, the QR code did not work. I noted that the cylindrical curvature (even small) ... 
[image-processing]
 

asked by Murta https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=2266 200 votes

answered by halirutan https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=187 194 votes

7.41.2.2 All that doesn't glitter isn't gold

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=249714

I would like to color some objects in metallic shades like gold and silver. Various web sources suggest that the gold is a variant of yellow with RGB values 83.14% red, 68.63% green, and 21.57% blue. ... 
[graphics] [color]
 

asked by bill s https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=1783 20 votes

answered by Tim Laska https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=61809 43 votes

7.41.2.3 How to create a new "person curve"?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=17704

Wolfram|Alpha has a whole collectionź of parametric curves that create images of famous people. To see them, enter  WolframAlpha["person curve"]  into a Mathematica ... 
[graphics] [image-processing] [algorithm] [wolfram-alpha-queries] [generative-art]
 

asked by Simon https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=34 87 votes

answered by Vitaliy Kaurov https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=13 46 votes

7.41.2.4 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

7.41.2.5 Find eigen energies of time-independent Schrödinger equation

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=32293

I'm trying to get the eigenvalues of a one dimensional time-independent Schrödinger equation, 
 
$-\frac{h^2}{2m_0}\frac{d^2\psi}{dx^2}+U(x)~\psi=Ei~\psi$ 
 
where U(x) is some potential and Ei is the ... 
[equation-solving] [physics] [parametric-functions]
 

asked by xslittlegrass https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=1364 50 votes

answered by Jens https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=245 46 votes

7.41.2.6 How can I plot a graph of an integral?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=78451

I want to plot the following function: 
 
$$\int \left(\frac{\Gamma (x+1)}{2}-\frac{\Gamma (x-1)}{2}\right) \, dx$$ 
[plotting]
 

asked by Anixx https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=651 4 votes

answered by k_v https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=24727 10 votes

7.41.2.7 Mathematica 12.3.1 Apple M1

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=250776

Mathematica version 12.3.1 just recently came out, and one of the biggest things is the support for apple silicon, the M1...I completely uninstalled version 12.3 and just reinstalled 12.3.1 to do some ... 
[mac-os-x] [compatibility]
 

asked by morbo https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=48686 9 votes

answered by kirkus https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=1601 14 votes