Is the Word "Data" Singular or Plural?
Do you say “data is” or “data are”? Let’s see what a grammar expert says about this issue.
View ArticleComments on Ezra Klein's "Romney's and Obama's tax plans, in one chart"
I present an alternative to Ezra Klein’s chart showing Romney’s and Obama’s tax plans in one chart so that equal intervals on the axis represent equal amounts.
View ArticleConsider Your Message When Choosing What Chart to Use
Different chart types emphasize different aspects of the data. Three figures show the same data but have different messages. Think about the story you want to tell before picking a chart type.
View ArticleShould I Shade Alternate Rows in My Tables?
This post cautions about blindly applying style guides without thinking. The preferred way to delineate rows or columns in tables is with white space. However, there may be times when the available...
View ArticleArrow Charts and Other Alternatives to Multiple Pie Charts
Arrow charts and slope charts are alternatives to multiple pie charts when the data consist of the values or the percentage breakdown of several categories for two time periods.
View ArticleThinking Outside the Chart Menu: Part 2
One of my earliest posts was Thinking Outside the Chart Menu. In it I mentioned that while menus and chart-choosers might be very useful to novices at graphing data, there were three things worth...
View ArticleConflicting Advice on Data Visualization
Writers offer conflicting advice on data visualization in blogs and books. I present an example where an alternative figure has at least as many problems as the figure being criticized.
View ArticleTrellis Plot Alternative to Three-Dimensional Bar Charts
Graph designers often try to put too much information in one plot resulting in confusing plots that are difficult to read. Trellis plots often provide the solution to displaying the data clearly.
View ArticleWinner of the Bad Graph Contest Announced
The finalists and the winner of the bad graph contest are announced. All of the entries had serious problems so choosing a winner was difficult.
View ArticleData Visualizations Skills Needed at PDF:Applied Hackathon
A hackathon, PDF:Applied, will take place in NYC on June 9-10 preceding the Personal Democracy Forum (PDF) conference. Those with data visualization skills are encouraged to participate.
View ArticleLinked Micromaps for Geographically Referenced Data
Linked micromaps are collections of small maps linked to corresponding plots. They were developed by Dan Carr and are an extremely useful tool that belongs in the toolbox of anyone who plots...
View ArticleBad Graph Contest: What Software Produces the Worst Graph?
A staggering number of really bad graphs are drawn daily. Some are the fault of the designers but often the software used to produce the graph is to blame. Use the comment area or email me at naomi at...
View ArticleAnother Misleading Graph Not Drawn to Scale
Graphs that are not drawn to scale mislead the reader. This post shows another example of a graph where the visual representation of the numbers is not proportional to the numbers themselves.
View ArticleGraph Redesign: Male and Female Publishing Disparities
Pie charts are rarely the best way to show data and multiple pie charts are even worse. A back-to-back bar chart presents the percentage of male and female reviewers in literary magazines collected by...
View ArticleTeaching Graphs to Preschoolers
Preschool children create a bar graph and talk about square numbers to the surprise of their parents.
View ArticleMisleading Pie Chart from the IRS
Since it is tax day I chose a chart from the IRS for my comments today. Figure 1 shows the chart with the labels cropped out. The wedges of a pie chart add to 100%. Please estimate the percentage of...
View ArticleGelman's Click-through Compromise for Statistical Graphics and Data Art
Artists and statisticians have different goals in creating visualizations. Andrew Gelman said that artists want visualizations to be creative, grabby and innovative while these characteristics are not...
View ArticleVisualizing Stop-and-Frisk and Murder Rates in New York City
Double panel, dual axis and indexed graphs were drawn to examine the relationship of NYC Police Department stop and frisks to the number of murders in NYC. All of the graphs clearly show that the...
View ArticleMisleading Graphs: Departing from Convention
Departing from conventions on designing and reading graphs can cause your graphs to mislead. One convention is that values increase from left to right. If you must depart from this convention,...
View ArticleFinding Examples of Misleading and Deceptive Graphs
Searching for the terms examples of misleading graphs or deceptive graphs is rarely the best way to find examples. A better way is to become familiar with graphical problems that cause a figure to...
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