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You're reading from  Learning NumPy Array

Product typeBook
Published inJun 2014
Reading LevelIntermediate
Publisher
ISBN-139781783983902
Edition1st Edition
Languages
Python
Tools
NumPy
Concepts
Data Science
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Author (1)
Ivan Idris
Ivan Idris
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Ivan Idris

Ivan Idris has an MSc in experimental physics. His graduation thesis had a strong emphasis on applied computer science. After graduating, he worked for several companies as a Java developer, data warehouse developer, and QA analyst. His main professional interests are business intelligence, big data, and cloud computing. Ivan Idris enjoys writing clean, testable code and interesting technical articles. Ivan Idris is the author of NumPy 1.5. Beginner's Guide and NumPy Cookbook by Packt Publishing.
Read more about Ivan Idris

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Introducing the dataset

First, we will learn about file I/O with NumPy. Data is usually stored in files. You would not get far if you are not able to read from and write to files.

The Royal Netherlands Meteorological Institute (KNMI) offers daily weather data online (browse to http://www.knmi.nl/climatology/daily_data/download.html). KNMI is the Dutch meteorological service headquartered in De Bilt. Let's download one of the KNMI files from the De Bilt weather station. The file is roughly 10 megabytes. It has some text with explanation about the data in Dutch and English. Below that is the data in comma-separated values format. I separated the metadata and the actual data into separate files. The separation is not necessary because you can skip rows when loading from NumPy. I wrote a simple script with NumPy to determine the maximum and minimum temperature for the dataset from a CSV file that was created in the separation process.

The temperatures are given in tenths of a degree Celsius. There...

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Learning NumPy Array
Published in: Jun 2014Publisher: ISBN-13: 9781783983902
© 2014 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Ivan Idris

Ivan Idris has an MSc in experimental physics. His graduation thesis had a strong emphasis on applied computer science. After graduating, he worked for several companies as a Java developer, data warehouse developer, and QA analyst. His main professional interests are business intelligence, big data, and cloud computing. Ivan Idris enjoys writing clean, testable code and interesting technical articles. Ivan Idris is the author of NumPy 1.5. Beginner's Guide and NumPy Cookbook by Packt Publishing.
Read more about Ivan Idris

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