12.6.2 Greatest hits from previous weeks

12.6.2.1 How can I plot a graph of an integral?
12.6.2.2 QR Code in shopping cart handle
12.6.2.3 How can I plot the direction field for a differential equation?
12.6.2.4 How to perform a multi-peak fitting?
12.6.2.5 Is it possible to recover an unsaved notebook after closing it?
12.6.2.6 Is it possible to export the equations from Mathematica to MATLAB?
12.6.2.7 How to graph a sphere with cartesian equations?
12.6.2.1 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 Score of 5
answered by k_v https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=24727 Score of 11
12.6.2.2 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
12.6.2.3 How can I plot the direction field for a differential equation?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=8841

I'd like to plot the graph of the direction field for a differential equation, to get a feel for it.  I'm a novice, right now, when it comes to plotting in Mathematica, so I'm hoping that someone can ... 
[plotting] [differential-equations]
 
asked by Matt Groff https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=1735 Score of 40
answered by Peter Breitfeld https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=307 Score of 31
12.6.2.4 How to perform a multi-peak fitting?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=26336

I am wondering how to implement the multi-peak detecting and fitting in Mathematica. Following is an example of fitting the data using three peaks (such that the data ~ peak1 + peak2 + peak3). 
The ... 
[fitting] [data] [peak-detection]
 
asked by Everett You https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=1389 Score of 58
answered by Silvia https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=17 Score of 57
12.6.2.5 Is it possible to recover an unsaved notebook after closing it?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=74205

I just Ctrl-Alt-Deleted out of Mathematica after I crashed it while running. I had not saved it all day and had done quite a lot of work on it. When I reopen the file, it shows a version with none of ... 
[crash] [save]
 
asked by Shane https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=25422 Score of 14
answered by bbgodfrey https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=1063 Score of 11
12.6.2.6 Is it possible to export the equations from Mathematica to MATLAB?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=14035

Is it possible to export the output expressions from Mathematica computations (e.g., equations) in valid MATLAB syntax? 
[export] [matlab]
 
asked by Seyhmus Güngören https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=4256 Score of 47
answered by rm -rf https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=5 Score of 51
12.6.2.7 How to graph a sphere with cartesian equations?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=24169

I'm new to Mathematica and I need to ask how to graph a sphere, cylinder, etc.. using cartesian equations. 
 
For example in sphere's case $x^2+y^2+z^2=1$ 
 
I tried to use ... 
[plotting]
 
asked by German https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=7145 Score of 10
answered by Dr. belisarius https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=193 Score of 16