Displaying change over time

For the Greek hairdressers, the party’s over

In the beginning of the Greek debt crisis, Greek hairdressers became one of the symbols of a badly managed country (they could retire at 50 with full benefits). But there is more and more interesting things to say about them. Take a look at inflation rates for hairdressing salons and personal grooming establishments in Greece. This is something that you [...]

By | January 28th, 2014|11 Chart types: change over time, Data|Comments Off on For the Greek hairdressers, the party’s over

Strange L-shaped trends

There is not much of a story in the expected evolution of US population, according to the United Nations estimates and projections (1950-2100): (You'll see in a moment why there is a vertical line in 2005.) Things get a little more interesting if you split population by age groups. You can see that population is getting old at the top [...]

Beautiful but Terrible Pyramids: Tableau Edition

Well, here is my first chart in Tableau, finally! After publishing my experiments with population pyramids (using Excel), I thought I could try Tableau Public with the same dataset from the US Census Bureau. Here is the result. I never really played before with Tableau Public and it took my less than an hour to upload the data and make [...]

By | July 12th, 2011|11 Chart types: change over time, Chart Types|11 Comments

Beautiful But Terrible Population Pyramids

These are the population pyramids (and half-pyramids...) of some more or less randomly selected countries. Each series displays population by age group (both sexes) in a given year, from 1981 (darker color) to 2050 (lighter color). The charts share the same scales (5-year age groups from 0 to 100+ in the y axis, and 0% - 20% in the x [...]

The health benefits of line charts

I recently bought a pedometer to make sure I walk at least those recommended 10,000 steps a day. As you can see, there is a strong variation, and no meaningful pattern is emerging. Now that I’m blogging about it, I’m sure that will happen soon :). It’s commonly accepted that, when displaying a time series, you should use line charts [...]

Charts: Monthly Unemployment Rates by State 1976-2009

Here are two ways to display a relatively large dataset, montly unemployment rates by state since 1976. The first one, above, is perfect to see the overall patterns, the range from the lowest to the highest, the outliers and the slopes. An interactive version would allow the user to highlight specific series. A small-multiple version allows the user to focus [...]

Spending Time Deciphering Time Utilization Charts

I really dislike stacked bar charts... Let's see a new bad example. Steve Rubel shares with us how he spent his time online (update: page no longer available) over the last two weeks. He uses the Firefox add-on PageAddict to monitor the time. He writes: As you can see almost all of my time online is work related. Still I [...]

By | September 30th, 2008|11 Chart types: change over time, Design|6 Comments