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NumPy Beginner's Guide

You're reading from   NumPy Beginner's Guide An action packed guide using real world examples of the easy to use, high performance, free open source NumPy mathematical library.

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Product type Paperback
Published in Apr 2013
Publisher Packt
ISBN-13 9781782166085
Length 310 pages
Edition 2nd Edition
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Author (1):
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Ivan Idris Ivan Idris
Author Profile Icon Ivan Idris
Ivan Idris
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Table of Contents (19) Chapters Close

Numpy Beginner's Guide Second Edition
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
1. NumPy Quick Start FREE CHAPTER 2. Beginning with NumPy Fundamentals 3. Get in Terms with Commonly Used Functions 4. Convenience Functions for Your Convenience 5. Working with Matrices and ufuncs 6. Move Further with NumPy Modules 7. Peeking into Special Routines 8. Assure Quality with Testing 9. Plotting with Matplotlib 10. When NumPy is Not Enough – SciPy and Beyond 11. Playing with Pygame Pop Quiz Answers Index

Time for action – gambling with the binomial


The binomial distribution models the number of successes in an integer number of independent trials of an experiment, where the probability of success in each experiment is a fixed number.

Imagine a 17th-century gambling house where you can bet on flipping of pieces of eight. Nine coins are flipped. If less than five are heads, then you lose one piece of eight, otherwise you win one. Let's simulate this, starting with 1000 coins in our possession. We will use the binomial function from the random module for that purpose.

In order to understand the binomial function, go through the following steps:

  1. Initialize an array, which represents the cash balance, to zeros. Call the binomial function with a size of 10000. This represents 10,000 coin flips in our casino.

    cash = np.zeros(10000)
    cash[0] = 1000
    outcome = np.random.binomial(9, 0.5, size=len(cash))
  2. Go through the outcomes of the coin flips and update the cash array. Print the minimum and maximum of...

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