Data Driven Documents

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Data-Driven Documents

Source: http://d3js.org/

Overview

 

D3.js is a JavaScript library for manipulating documents based on data. D3 helps you bring data to life using HTML, SVG and CSS. D3’s emphasis on web standards gives you the full capabilities of modern browsers without tying yourself to a proprietary framework, combining powerful visualization components and a data-driven approach to DOM manipulation.

Download the latest version here:

  • d3.v3.zip My Note: I did this and did not see much.

Or, to link directly to the latest release, copy this snippet:

<script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script>

My Note: http://d3js.org/d3.v3.min.js links to 

d3js.org-d3.v3.min.js.png

The full source and tests are also available for download on GitHub.

My Note: There is more Overview, but I did not find data.

Copyright 2012 

Released under BSD license

Examples

Source: https://github.com/mbostock/d3/wiki/Gallery

Welcome to the D3 gallery! Feel free to add links to your work! More examples are available on bl.ocks.org/mbostock. If you want to share an example and don't have your own hosting, consider using Gist and bl.ocks.org.

Box Plot

Source: http://bl.ocks.org/mbostock/4061502

mbostock’s block #4061502 My Note: I need to see if there are data at these links

August 6, 2013

A box-and-whisker plot uses simple glyphs that summarize a quantitative distribution with five standard statistics: the smallest value, lower quartile, median, upper quartile, and largest value. This summary approach allows the viewer to easily recognize differences between distributions. Data from the Michelson–Morley experiment. Implementation contributed by Jason Davies. This example periodically randomizes the values to demonstrate transitions.

My Note: I did not understand why "This example periodically randomizes the values to demonstrate transitions."

Data: http://bl.ocks.org/mbostock/4061502#morley.csv

My Note: I scraped this to a notepad file and imported it in to Spotfire and created a Box Plot that I thought was meaningful as a Data Scientist

BoxPlot-Michelson–Morley Experiment Data.png:

My Note: Michael Bostock also did not provide any real statistical explanation of a Box Plot: See Spotfire Documentation Links below: Users Guide and Visualizations

Let's Make a Map

Source: http://bost.ocks.org/mike/map/

December 30, 2012

In this tutorial, I’ll cover how to make a modest map from scratch using D3 and TopoJSON. I’ll show you a few places where you can find free geographic data online, and how to convert it into a format that is both efficient and convenient for display. I won’t cover thematic mapping, but the map we’ll make includes labels for populated places and you can extend this technique to geographic visualizations such as graduated symbol maps and choropleths.

Without further ado, here’s the map:

Shown are the four constituent countries of the United Kingdom: ScotlandNorthern IrelandWalesand England. As maps go, it’s not particularly interesting, but the simplicity should serve adequately to demonstrate the basics of map-making.

Finding Data

The first task for any map is finding geometry. The primary source for administrative boundaries and other official data is the respective government. The U.S. Census Bureau, for example, publishes geometry for a range of spatial subdivisions such as states, counties and census tracts. As government work, this data is typically in the public domain and thus free to use. The Ordnance Survey provides similar vector data for the UK.

Unfortunately, government data can sometimes be hard to find or use. Just ask anyone who’s wrangled with GRIB files or aimlessly traversed mysterious FTP servers! This should improve over time as demand for data grows, but there will always be cruft from past releases and confusing formats spawned by committee. Projects such as Data.gov and the Sunlight Foundation aim specifically to improve the quality of government data offerings, and sites such as Social Explorerpackage up government data in more accessible formats.

For a crowdsourced alternative, GeoCommons is a platform for sharing geographic datasets. Integrated search and preview make it easy to explore. But, while there’s lots of useful data, you should be wary of unverified sources, at least for journalism; it’s better to get data directly from an official agency or other citeable source.

Hands-down, the most convenient source of free geographic data is Natural Earth. An apparent labor of love by cartographer Nathaniel Vaughn Kelso (and others), Natural Earth provides a variety of cultural, physical and raster datasets. Shapefiles are beautifully simplified by hand for different resolutions, letting you choose the resolution appropriate to your application. We’ll use two 1:1e7 Natural Earth datasets for this map:

The first includes country polygons, while the second has names and locations of populated places. Both of these files cover the entire world, so we’ll next filter the data to a suitable subset.

My Note: I deownloaded these two Earth datasets and imported there two Shapefiles into Spotfire and created a Map Chart that I thought was meaningful as a Data Scientist

MapChart-LetsMakeaMap.png

My Note: Michael Bostock also did not provide any real statistical explanation of a Map Chart: See Spotfire Documentation Links below: Users Guide and Visualizations

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