Posts Tagged ‘ graphics ’

Example 7.28: Bubble plots

March 22, 2010
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Example 7.28: Bubble plots

A bubble plot is a means of displaying 3 variables in a scatterplot. The z dimension is presented in the size of the plot symbol, typically a circle. The area or radius of the circle plotted is proportional to the value of the third variable. This c...

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A Visual History Of Twitter’s Growth (Updated 2010-08-23)

March 22, 2010
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Download "Getting Started with the Social Media Analytics Research Toolkit" (pdf, 1.25 megabytes) Download the Social Media Analytics Research Toolkit How The Chart Was Made Whenever a Twitter user posts a tweet, an object is created and entered into t...

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Because it’s Friday: Kittens, beware Tufte

March 19, 2010
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Because it’s Friday: Kittens, beware Tufte

Edward Tufte has been a tireless promoter of good infographics, and he's even taken some controversial steps to rid the world of chartjunk. But now he's gone too far: Then again, this chart from the Wall Street Journal could lead anyone to felinicide: What's wrong with a simple bar chart, WSJ? Mark Goetz: My New Wallpaper (via @sarahd23 and...

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Nutritional supplements, ranked

March 16, 2010
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Nutritional supplements, ranked

One of my favourite shows on TV right now is The Big Bang Theory. For those who haven't seen it: it's like Friends, except instead of New York yuppies, it's PhD physicists and engineers at CalTech. It's nice to see geeks and smart people be the focus (rather than the comic relief) of a sitcom. Also, the equations on...

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Clustering the world’s diets

March 10, 2010
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Clustering the world’s diets

Cluster Analysis is a useful technique for classifying the members of a group (people, events, measurements, etc) into "similar" groups. How "similar" is defined depends on the application, but generally involves looking at a number of attributes of the group. For example, we could cluster people by looking at their skin color, hair type, facial features, perhaps even genetic...

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White House taps Edward Tufte to explain the stimulus

March 8, 2010
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White House taps Edward Tufte to explain the stimulus

Edward Tufte, a pioneer of effective data visualization (and a personal hero) has just been appointed by the White House to the Recovery Independent Advisory Panel. This panel advises The Recovery Accountability and Transparency Board, whose job is to track and explain $787 billion in recovery stimulus funds. Tufte explains: I'm doing this because I like accountability and transparency,...

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Chilean earthquake: impact of the tsunami

March 8, 2010
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Chilean earthquake: impact of the tsunami

The National Oceanic and Atmospheric Administration (NOAA) has a page with some interesting information about last week's earthquake in Chile, but what really stood out for me was this chart of the predicted wave heights around the globe resulting from the associated tsunami: Click to enlarge: it's a fascinating chart. Although labelled a forecast, from the explanations on the...

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ggplot and concepts — what’s right, and what’s wrong

March 7, 2010
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ggplot and concepts — what’s right, and what’s wrong

A few months back I gave a presentation to the NYC R Meetup. (R is a statistical programming language. If this means nothing to you, feel free to stop reading now.) The presentation was on ggplot2, a popular package for generating graphs of data and statistics. In the talk (which you can see here, including

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Example 7.25: compare draws with distribution

March 5, 2010
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Example 7.25: compare draws with distribution

In example 7.24, we demonstrated a Metropolis-Hastings algorithm for generating observations from awkward distributions. In such settings it is desirable to assess the quality of draws by comparing them with the target distribution.Recall that the dis...

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Analyzing Google’s Winter Olympics Search Traffic with R

March 2, 2010
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Analyzing Google’s Winter Olympics Search Traffic with R

The Official Google Blog today includes an analysis of Google's search traffic related to the recently-concluded Winter Olympics, correlating various high-profile events with searches from particular countries. For example, traffic from the United States shows the expected diurnal cycle but with promintent peaks for the opening ceremony and the hockey matches featuring the USA team: It's not specifically stated...

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