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SciPy Recipes

You're reading from   SciPy Recipes A cookbook with over 110 proven recipes for performing mathematical and scientific computations

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Product type Paperback
Published in Dec 2017
Publisher Packt
ISBN-13 9781788291460
Length 386 pages
Edition 1st Edition
Languages
Tools
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Authors (3):
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V Kishore Ayyadevara V Kishore Ayyadevara
Author Profile Icon V Kishore Ayyadevara
V Kishore Ayyadevara
Ruben Oliva Ramos Ruben Oliva Ramos
Author Profile Icon Ruben Oliva Ramos
Ruben Oliva Ramos
Luiz Felipe Martins Luiz Felipe Martins
Author Profile Icon Luiz Felipe Martins
Luiz Felipe Martins
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Toc

Table of Contents (11) Chapters Close

Preface 1. Getting to Know the Tools FREE CHAPTER 2. Getting Started with NumPy 3. Using Matplotlib to Create Graphs 4. Data Wrangling with pandas 5. Matrices and Linear Algebra 6. Solving Equations and Optimization 7. Constants and Special Functions 8. Calculus, Interpolation, and Differential Equations 9. Statistics and Probability 10. Advanced Computations with SciPy

Computations on top of a sparse matrix

In order to understand how to perform computations on top of a sparse matrix and the resulting benefits thereof, we will be looking at an example and comparing the difference between having a sparse matrix and not having a sparse matrix.

Solving a system of equations

As discussed in the Solving linear systems using matrices recipe, a system of equations is solved using the solve function in scipy.linalg.

In order to compare the difference between sparse matrix computation and non-sparse matrix computation, we will perform the following tasks:

  • Import relevant packages
  • Initialize a 10,000 x 10,000 matrix named A
  • Impute very few values with some random numbers
  • Set the diagonal, so that the rank of matrix is not reduced by a lot
  • Initialize a set of values for the output b so that the equation A*x = b is set up
  • Solve for the values of x once...
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