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Chapter 3. Getting to Grips with Commonly Used Functions

In this chapter, we will cover a number of commonly used functions:

• sqrt(), log(), arange(), astype(), and sum()
• ceil(), modf(), where(), ravel(), and take()
• sort() and outer()
• diff(), sign(), and eig()
• histogram() and polyfit()
• compress() and randint()

We will be discussing these functions in the following recipes:

• Summing Fibonacci numbers
• Finding prime factors
• Finding palindromic numbers
• The steady state vector
• Discovering a power law
• Trading periodically on dips
• Simulating trading at random
• Sieving integers with the Sieve of Eratosthenes

Introduction

This chapter is about the commonly used NumPy functions. These are the functions that you will be using on a daily basis. Obviously, the usage may differ ...

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