Download Learning Haskell Data Analysis by James Church PDF

By James Church

While you are a developer, analyst, or info scientist who desires to research information research equipment utilizing Haskell and its libraries, then this ebook is for you. previous event with Haskell and a uncomplicated wisdom of knowledge technological know-how should be invaluable.

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Let us begin by computing the mean of a list in Haskell. The mean of a list of numbers is computed by finding the summation of this list and dividing this sum by the number of elements in the list. The data presented here represents the final score made by the Atlanta Falcons in each of their games during the 2013 NFL football season. Not a football fan? Don't worry. Focus only on the numbers. The purpose of this example is to make you work on a small, real-world dataset. There are 16 games in this dataset, and we can present them all in a single line, as follows: > let falconsScores = [17,31,23,23,28,31,13,10,10,28,13,34,21,27,24,20] Computing the sum of a list At this point, falconsScores is just a list of numbers.

Hs. hs blank file will be added back to your folder. When you inspect your file, you will see that the changes are gone and the file is restored. Hurray! If you have a project consisting of at least one file, you should use version control. Here is the general workflow for branchless version control: 1. Think. 2. Write some code. 3. Test that code. 4. Commit that code. 5. Go to step 1. It doesn't take long to see the benefits of version control. Mistakes happen and version control is there to save you.

Based on this, we can plan an algorithm to compute a median. First, we will sort the numbers. Second, we will determine whether there are an even number of elements or an odd number. Finally, we will return the appropriate middle value. [ 11 ] Tools of the Trade Create a new folder on your computer where your Haskell files will be stored. You should put all your files in a directory called ~/projects/ LearningHaskellDataAnalysis. hs (hopefully, you created this file earlier in our demonstration of Git).

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