7.34.2 Greatest hits from previous weeks

7.34.2.1 How to perform a multi-peak fitting?
7.34.2.2 Mathematica 12.3.1 Apple M1
7.34.2.3 How to add a vertical line to a plot
7.34.2.4 Plotting a Phase Portrait
7.34.2.5 Plot, extract data to a file
7.34.2.6 Labeling individual curves in Mathematica
7.34.2.7 Creating a table/Matrix during a For loop
7.34.2.1 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 56 votes
answered by Silvia https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=17 55 votes
7.34.2.2 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 12 votes
7.34.2.3 How to add a vertical line to a plot

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=3561

In the plot below I would like to add two vertical lines at $x = \frac{\pi}{15} \pm \frac{1}{20}$. 
How can I do that? 
 
... 
[plotting]
 
asked by sjdh https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=515 69 votes
answered by Ajasja https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=745 86 votes
7.34.2.4 Plotting a Phase Portrait

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=14160

I'm trying to plot a phase portrait for the differential equation 
$$x'' - (1 - x^2) x' + x = 0.5 \cos(1.1 t)\,.$$ 
The primes are derivatives with respect to $t$. I've reduced this second order ODE to ... 
[plotting] [differential-equations]
 
asked by covertbob https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=4528 39 votes
answered by David Slater https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=1746 36 votes
7.34.2.5 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 34 votes
answered by Mr.Wizard https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=121 52 votes
7.34.2.6 Labeling individual curves in Mathematica

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=4444

I need to create a plot for export and inclusion in a report. Is there a better way to label curves than  PlotLegends ? From what I've read and my personal experience,... 
[plotting] [legending]
 
asked by Tianxiang Xiong https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=1041 63 votes
answered by Artes https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=184 47 votes
7.34.2.7 Creating a table/Matrix during a For loop

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=2930

I have a  For  loop (with  i  as a counter), which calculates different values ( y1 , ... 
[matrix]
                                                                                  

                                                                                  
 
asked by Solarboy https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=727 12 votes
answered by Mr.Wizard https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=121 15 votes