11.3.2 Greatest hits from previous weeks

11.3.2.1 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 Score of 203

answered by halirutan https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=187 Score of 197

11.3.2.2 Conversion of Sine to Cosine

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=67521

I'm solving equations with many Cosines and Sines. 
And I want to convert all the Sines to Cosines using trigonometric formulas such as cos(x)=sin(x+pi/2). 
How can I do this? 
[trigonometry] [conversion]
 

asked by YongCheol Kwon https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=23041 Score of 6

answered by Sjoerd C. de Vries https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=57 Score of 2

11.3.2.3 Make a scatter plot from two lists

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=21884

I have two lists of values 
 
 xx = {0.1, 0.3, 0.35, 0.57, 0.88, 1.0} 
yy = {1.2, 3.5, 4.5, 7.8, 9.0, 12.2} 
 
 
I want to make a scatter plot (list plot) with xx as x ... 
[plotting]
 

asked by JACKY88 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=2403 Score of 31

answered by Eric Thewalt https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=6313 Score of 46

11.3.2.4 Placing text within a plot

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=71776

I want to place text within a plot. The text is always centered relative to the coordinates. How can I left-align or right-align the text relative to the coordinates? For example: 
 
... 
[plotting] [graphics] [text]
 

asked by Anthony Mannucci https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=24733 Score of 29

answered by m_goldberg https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=3066 Score of 13

11.3.2.5 How to export data to a plain text file?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=46867

I am preparing data used by a command line program. It requires data in a simpliest possible format: 
 
 value_x1 value_y1 
value_x2 value_y2 
... 
value_xN value_yN 
 
... 
[export] [files-and-directories] [streams]
 

asked by Misery https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=742 Score of 10

11.3.2.6 How can I draw water level in a cylinder like this?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=306406

I see this question here and here.  I don't know how to start. I can 
 Graphics3D[Cylinder[], Boxed -> False] 
 
[graphics3d]
 

asked by minhthien_2016 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=5320 Score of 18

answered by cvgmt https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=72111 Score of 27

11.3.2.7 Plot, extract data to a file

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=19859

I need to save data that Mathematica uses inside the  Plot  command. The format that I would like to have is: 
 
 x1 y1 
x2 y2 
..... 
 
 
... 
[plotting] [export]
 

asked by molkee https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=5097 Score of 37

answered by Mr.Wizard https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=121 Score of 55