11.36.2 Greatest hits from previous weeks

11.36.2.1 Skip header lines on import
11.36.2.2 Labeling individual curves in Mathematica
11.36.2.3 Principal submatrix and Principal minor of a matrix
11.36.2.4 How to find the position of elements in a list satisfying criteria
11.36.2.5 How to make a Spherical Cow?
11.36.2.6 Drawing a square root spiral
11.36.2.7 1 Plot, 2 Scale/Axis
11.36.2.1 Skip header lines on import

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=50718

When importing a data file what are the comment symbols for Mathematica? 
That is, given a file like this 
 
 blabla 
bulbul 
 
1 2 6 54 7 ... 
.. 
 
 
what symbol do I have ... 
[import] [text]
 
asked by MaxJ https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=14687 Score of 21
answered by george2079 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=2079 Score of 18
11.36.2.2 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 Score of 65
answered by Artes https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=184 Score of 48
11.36.2.3 Principal submatrix and Principal minor of a matrix

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=154018

A submatrix of a matrix is obtained by deleting any collection of rows and/or columns. 
 
For example, from the following 3-by-4 matrix, we can construct a 2-by-3 submatrix by removing row 3 and column ... 
[list-manipulation] [matrix] [programming] [linear-algebra]
 
asked by Emad kareem https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=44458 Score of 10
11.36.2.4 How to find the position of elements in a list satisfying criteria

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=180

Say I have a list  x={2,4,6,8,10}  and I want to find out the positions of the elements that are greater than 7. 
 
... 
[list-manipulation]
 
asked by PeterR https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=140 Score of 76
answered by J. M.'s missing motivation https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=50 Score of 82
11.36.2.5 How to make a Spherical Cow?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=125043

Being a theoretical physicist, I always have a great respect for Spherical Cow. So I thought about making one myself. I am not sure how can I create (something considered to be the simplest!) this ... 
[geometry] [image3d]
 
asked by Sumit https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=8070 Score of 75
answered by andre314 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=5467 Score of 83
11.36.2.6 Drawing a square root spiral

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=66969

Here is a start. I'm looking for a nice way to draw it. 
 
... 
[graphics] [geometry]
 
asked by matrix42 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=5379 Score of 26
answered by Bob Hanlon https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=9362 Score of 27
11.36.2.7 1 Plot, 2 Scale/Axis

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=627

I would like to plot those two datasets on top of each other. But they have very different range on the $y$ axis. How can I have two different axis? 
 
I found the following on the help menu but quite ... 
[plotting] [customization]
 
asked by 500 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=172 Score of 164
answered by ArgentoSapiens https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=92 Score of 165