Data Science at the Command Line by Jeroen Janssens

By Jeroen Janssens

This hands-on consultant demonstrates how the flexibleness of the command line might be useful turn into a extra effective and effective information scientist. You’ll how you can mix small, but strong, command-line instruments to speedy receive, scrub, discover, and version your data.

To get you started—whether you’re on home windows, OS X, or Linux—author Jeroen Janssens introduces the knowledge technological know-how Toolbox, an easy-to-install digital setting choked with over eighty command-line tools.

Discover why the command line is an agile, scalable, and extensible know-how. whether you’re already cozy processing information with, say, Python or R, you’ll drastically enhance your facts technology workflow by way of additionally leveraging the facility of the command line.

receive facts from web content, APIs, databases, and spreadsheets
practice scrub operations on undeniable textual content, CSV, HTML/XML, and JSON
discover facts, compute descriptive facts, and create visualizations
deal with your info technological know-how workflow utilizing Drake
Create reusable instruments from one-liners and present Python or R code
Parallelize and distribute data-intensive pipelines utilizing GNU Parallel
version info with dimensionality aid, clustering, regression, and category algorithms

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When the URL is password protected, you can specify a username and a password as follows: $ curl -u username:password ftp://host/file If the specified URL is a directory, curl will list the contents of that directory. co/, your browser automatically redirects you to the correct location. mp;expires=Mon Nov 17 The first line indicates the HTTP status code, which is 301 (moved permanently) in this case. org/ wiki/List_of_countries_and_territories_by_border/area_ratio. Inspecting the header and getting the status code is a useful debugging tool in case curl does not give you the expected result.

H. M. (2014). Data Science Toolbox. org. • Oracle. (2014). VirtualBox. org. • HashiCorp. (2014). Vagrant. com. • Heddings, L. (2006). Keyboard Shortcuts for Bash. com/howto/ubuntu/keyboard-shortcuts-for-bash-commandshell-for-ubuntu-debian-suse-redhat-linux-etc. , & Loukides, M. (2002). ). O’Reilly Media. Further Reading | 27 CHAPTER 3 Obtaining Data This chapter deals with the first step of the OSEMN model: obtaining data. After all, without any data, there is not much data science that we can do.

Some tasks are very specific and others can be generalized. If you foresee or notice that you need to repeat a certain one-liner on a regular basis, it’s worthwhile to turn this into a command-line tool of its own. Both one-liners and command-line tools have their uses. Recognizing the opportunity requires practice and skill. The advantage of a command-line tool is that you don’t have to remember the entire one-liner and that it improves readability if you include it into some other pipeline. The benefit of working with a programming language is that you have the code in a file.

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