Download e-book for kindle: Clojure Data Analysis Cookbook by Eric Rochester

By Eric Rochester

As info invades progressively more of lifestyles and company, the necessity to research it successfully hasn't ever been larger. With Clojure and this e-book, youll quickly be attending to grips with each element of knowledge research. Youll commence with sensible recipes that aid you load and fresh your information, then get concise directions to accomplish the entire crucial research initiatives from easy information to classy laptop studying and knowledge clustering algorithms. Get a extra intuitive deal with in your information via hands-on visualization innovations that let you offer attention-grabbing, informative, and compelling reviews, and use Clojure to post your findings to the net.

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Example text

Csv. The version designation might be different though, as the file is updated. You'll also need to register on the site in order to download the data. 598464,"REST AREA SB I-95 MM240","RR, PT, Pets, HF" In the project directory, we have to create a subdirectory named data and place the file in this subdirectory. csv. 594001 | REST AREA NB I-95 MM240 | RR, PT, Pets, HF | … How it works… Together, Clojure and Incanter make a lot of common tasks easy, which is shown in the How to do it section of this recipe.

Here are some examples of these styles, and an explanation of their meaning. Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "Now, there will be a new subdirectory named getting-data. 0"]]) When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold: (defn watch-debugging [input-file] (let [reader (agent (seque (mapcat lazy-read-csv input-files))) caster (agent nil) sink (agent []) counter (ref 0) done (ref false)] (add-watch caster :counter (partial watch-caster counter)) (add-watch caster :debug debug-watch) (send reader read-row caster sink done) (wait-for-it 250 done) {:results @sink :count-watcher @counter})) Any command-line input or output is written as follows: $ lein new getting-data Generating a project called getting-data based on the default template.

Get-rows processes each article tag. It calls get-family to get that information from the header, gets the list item for each person, calls get-person on the list item, and adds the family to each person's mapping. Here's how the HTML structures correspond to the functions that process them. Each function name is mentioned beside the elements it parses: Finally, load-data ties the process together by downloading and parsing the HTML file and pulling the article tags from it. It then calls get-rows to create the data mappings and converts the output to a dataset.

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Clojure Data Analysis Cookbook by Eric Rochester


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