Clojure Data Analysis Cookbook by Eric Rochester

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By Eric Rochester

As facts invades an increasing number of of lifestyles and company, the necessity to research it successfully hasn't ever been larger. With Clojure and this ebook, youll quickly be attending to grips with each element of information research. Youll commence with functional recipes that enable you to load and fresh your facts, then get concise directions to accomplish the entire crucial research initiatives from easy records to stylish laptop studying and knowledge clustering algorithms. Get a extra intuitive deal with in your facts via hands-on visualization thoughts that let you offer attention-grabbing, informative, and compelling studies, and use Clojure to submit your findings to the net.

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This structure is inserted into the third expression as the last parameter, and so on, until the end of the form. Let's trace this through a few steps. Say, we start off with the expression (->> x first (map length) (apply +)). As Clojure builds the final expression, here's each intermediate step (the elements to be combined are highlighted at each stage): (->> x first (map length) (apply +))(->>(first x) (map length) (apply +))(->>(map length (first x)) (apply +))(apply + (map length (first x))) Comparing XML and JSON XML and JSON (from the Reading JSON data into Incanter datasets recipe) are very similar.

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.

Core namespace and for tests. How it works... clj. This file contains metadata about the project, such as its name, version, license, and more. It also contains a list of the dependencies that our code will use, as shown in the following snippet. org/) in order to download the project's dependencies. org/). 0"]]) In the Getting ready section of each recipe, we'll see the libraries that we need to list in the :dependencies section of this file. Then, when you run any lein command, it will download the dependencies first.

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