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Python Data Visualization Cookbook (Second Edition)

Python Data Visualization Cookbook (Second Edition)

By : Igor Milovanovic, Dimitry Foures, Giuseppe Vettigli
4 (6)
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Python Data Visualization Cookbook (Second Edition)

Python Data Visualization Cookbook (Second Edition)

4 (6)
By: Igor Milovanovic, Dimitry Foures, Giuseppe Vettigli

Overview of this book

Python Data Visualization Cookbook will progress the reader from the point of installing and setting up a Python environment for data manipulation and visualization all the way to 3D animations using Python libraries. Readers will benefit from over 60 precise and reproducible recipes that will guide the reader towards a better understanding of data concepts and the building blocks for subsequent and sometimes more advanced concepts. Python Data Visualization Cookbook starts by showing how to set up matplotlib and the related libraries that are required for most parts of the book, before moving on to discuss some of the lesser-used diagrams and charts such as Gantt Charts or Sankey diagrams. Initially it uses simple plots and charts to more advanced ones, to make it easy to understand for readers. As the readers will go through the book, they will get to know about the 3D diagrams and animations. Maps are irreplaceable for displaying geo-spatial data, so this book will also show how to build them. In the last chapter, it includes explanation on how to incorporate matplotlib into different environments, such as a writing system, LaTeX, or how to create Gantt charts using Python.
Table of Contents (11 chapters)
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10
Index

Installing matplotlib on Mac OS X

The easiest way to get matplotlib on the Mac OS X is to use prepackaged python distributions such as Enthought Python Distribution (EPD). Just go to the EPD site, and download and install the latest stable version for your OS.

In case you are not satisfied with EPD or cannot use it for other reasons such as the versions distributed with it, there is a manual (read: harder) way of installing Python, matplotlib, and its dependencies.

Getting ready

We will use the Homebrew (you could also use MacPorts in the same way) project that eases the installation of all software that Apple did not install on your OS, including Python and matplotlib. Under the hood, Homebrew is a set of Ruby and Git that automate download and installation. Following these instructions should get the installation working. First, we will install Homebrew, and then Python, followed by tools such as virtualenv, then dependencies for matplotlib (NumPy and SciPy), and finally matplotlib. Hold on, here we go.

How to do it...

  1. In your terminal, paste and execute the following command:
    ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
    

    After the command finishes, try running brew update or brew doctor to verify that the installation is working properly.

  2. Next, add the Homebrew directory to your system path, so the packages you install using Homebrew have greater priority than other versions. Open ~/.bash_profile (or /Users/[your-user-name]/.bash_profile) and add the following line to the end of file:
    export PATH=/usr/local/bin:$PATH
    
  3. You will need to restart the terminal so that it picks a new path. Installing Python is as easy as firing up another one liner:
    brew install python --framework --universal

    This will also install any prerequisites required by Python.

  4. Now, you need to update your path (add to the same line):
    export PATH=/usr/local/share/python:/usr/local/bin:$PATH
  5. To verify that the installation has worked, type python --version in the command line, you should see 2.7.3 as the version number in the response.
  6. You should have pip installed by now. In case it is not installed, use easy_install to add pip:
    $ easy_install pip
    
  7. Now, it's easy to install any required package; for example, virtualenv and virtualenvwrapper are useful:
    pip install virtualenv
    pip install virtualenvwrapper
    
  8. The next step is what we really wanted to do all along—install matplotlib:
    pip install numpy
    brew install gfortran
    pip install scipy
    
  9. Verify that everything is working. Call Python and execute the following commands:
    import numpy
    print numpy.__version__
    import scipy
    print scipy.__version__
    quit()
    
  10. Install matplotlib:
    pip install matplotlib
    
CONTINUE READING
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