10.3.1 Top new questions this week

10.3.1.1 Stream reading 1000 times faster in Python

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=296645

I have a 26GB CSV. I want to extract all the rows that have data for a specific sensor. In Mathematica I write: 
... 
[streams]
 

asked by Eric William Smith https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=27694 Score of 14

answered by azerbajdzan https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=53172 Score of 18

10.3.1.2 Poincaré section of the particle motion near the black hole horizon

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=296772

I am trying to recreate the Poincaré sections given in Figure 2 of this paper. 
 
For this purpose, I use the following two methods: 
Method1: Using ResourceFunction["ClickPoincarePlot2D"] 
<... 
[differential-equations] [equation-solving] [calculus-and-analysis] [physics] [sow-reap]
 

asked by codebpr https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=78049 Score of 7

answered by I.M. https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=26815 Score of 6

10.3.1.3 How to condition all cells of a notebook to a specific SeedRandom?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=296831

Is there a way to fix  SeedRandom[.]  for an entire notebook? If I carry out many calculations using random numbers, I need to give a separate code ... 
[evaluation] [random] [code-request] [cells]
 

asked by Tugrul Temel https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=60365 Score of 7

answered by azerbajdzan https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=53172 Score of 9

10.3.1.4 Counting non-zero multiplications in large sparse matrix multiplications

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=296653

Suppose I have several large, fixed, sparse matrices of real-valued entries.  To make things simple, assume each is $n \times n$.  I will multiply them, e.g., matA.matB.matC.  Of course I can reduce ... 
[matrix] [sparse-arrays]
 

asked by David G. Stork https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=9735 Score of 7

answered by kglr https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=125 Score of 4

10.3.1.5 Manipulating rules

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=296908

I tried searching in the docs in "Transformation Rules and Definitions", however there wasn't anything of help. 
So imagine I have these two rules: 
... 
[replacement] [expression-manipulation] [rule]
 

asked by Confuse-ray30 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=96205 Score of 6

answered by eldo https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=14254 Score of 10

10.3.1.6 How do I plot the desired phase space diagram with an iron cables-like structure?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=296836

I want to plot the phase space diagram of the Lorenz attractor shown below on the top figure; however, I can only plot the bottom figure in Mathematica. 
... 
[plotting] [graphics] [graphics3d]
 

asked by user444 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=84456 Score of 6

answered by cvgmt https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=72111 Score of 10

10.3.1.7 Colouring the "leaves" (self-intersections) of space curves

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=296780

I recently asked how to 
colour the "leaves" (self-intersections) of parametric curves 
and got two great answers from  cvgmt  and ... 
[plotting] [graphics3d] [regions]
 

asked by eldo https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=14254 Score of 6

answered by kglr https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=125 Score of 6