Book Image

Julia 1.0 Programming. - Second Edition

By : Ivo Balbaert
Book Image

Julia 1.0 Programming. - Second Edition

By: Ivo Balbaert

Overview of this book

The release of Julia 1.0 is now ready to change the technical world by combining the high productivity and ease of use of Python and R with the lightning-fast speed of C++. Julia 1.0 programming gives you a head start in tackling your numerical and data problems. You will begin by learning how to set up a running Julia platform, before exploring its various built-in types. With the help of practical examples, this book walks you through two important collection types: arrays and matrices. In addition to this, you will be taken through how type conversions and promotions work. In the course of the book, you will be introduced to the homo-iconicity and metaprogramming concepts in Julia. You will understand how Julia provides different ways to interact with an operating system, as well as other languages, and then you'll discover what macros are. Once you have grasped the basics, you’ll study what makes Julia suitable for numerical and scientific computing, and learn about the features provided by Julia. By the end of this book, you will also have learned how to run external programs. This book covers all you need to know about Julia in order to leverage its high speed and efficiency for your applications.
Table of Contents (17 chapters)
Title Page
Copyright and Credits
Packt Upsell
Contributors
Preface
Index

Elementary mathematical functions and operations


You can view the binary representation of any number (integer or float) with the bitstring function, for example, bitstring(3) returns "0000000000000000000000000000000000000000000000000000000000000011".

 

 

To round a number, use the round() function which returns a floating point number. All standard mathematical functions are provided, such as sqrt(), cbrt(), exp(), log(), sin(), cos(), tan(), erf() (the error function), and many more (refer to the URL mentioned at the end of this section). To generate a random number, use rand().

Use parentheses ( ) around expressions to enforce precedence. Chained assignments, such as a = b = c = d = 1, are allowed. The assignments are evaluated right-to-left. Assignments for different variables can be combined, as shown in the following example:

  a = 1; b = 2; c = 3; d = 4  a, b = c, d

Now, a has a value of 3 and b has a value of 4. In particular, this makes an easy swap possible:

  a, b = b, a   # now a is...