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Koen Van den Eeckhout
@vandeneeckhoutkoen.bsky.social
📊 Turning complex data into powerful visual stories! Author of 'Powerful Charts'. Ex-physicist. He/him 🏳️‍🌈
462 followers34 following76 posts

⚠️ Apply the color scale logically: light colors for low, dark colors for high values. That's because our brain is secretly comparing the cell colors with the background color. Darker colors = more contrast with background = more visually prominent = bigger numbers! (4/4)

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⚠️ Make sure to use an optimized sequential color scale - nicely going from light to dark, because the we use the color brightness as visual variable to show the data. Some rainbow scales have brightnesses that go all over the place - a nightmare for colorblind people! (3/4)

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⚡ Want to be even more compact? Just leave out the data values, and rely purely on the colors! If accuracy is less important, this is the most space-efficient way to show a pattern. (2/4)

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Day 4 of exploring alternative chart types for the same dataset: a heatmap! ✅ Probably one of the most compact ways to show the data. ✅ Great compromise between precision (showing the data values) and clarity (visualizing the big patterns). (1/4) #dataviz

Comparison between a line chart (above) and a heatmap (below) for the same data. The charts show the evolution of four types of car between 2014 and 2024 in Belgium: gasoline, diesel, hybrid and electric. Diesel is big but shrinking, electric is small but rising.
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Thanks a lot, Andy! 🍻

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🥳 My company Baryon is celebrating! EXACTLY 10 years ago I became a real information designer. Back then it was still a side hustle, a hobby that got out of hand. To celebrate, here's a snippet from some of my very first paid work. (I have older stuff, but that's too embarrassing to share! 🫣)

Three posters about Ghent University Life Tech, titled 'Explore with us', 'Partner with us', and 'Innovate with us'. All three use colored hexagons and icons to illustrate the different activities this UGent expertise center is supporting.
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These charts may look pretty at first sight, but they're useless because they are impossible to interpret. UX and UI designers, please don't make charts an afterthought! PS: on a totally unrelated note, you can hire me for #datavizhttps://buff.ly/4edCUQt (3/3)

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⚡ No labels on the horizontal or vertical axes (only when you hover over the chart) ⚡ Shaded area chart doesn't start at zero (just make it a line chart and it would be solved) ⚡ Unnecessary smoothing of the charts (we have no idea how many data points we're looking at) (2/3)

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🥲 I'm often quite surprised by the low quality of charts even in well-known, well-developed tools such as Buffer (the social media scheduling tool I use). (1/3)

Screenshot of charts in the 'analytics' section of Buffer, a social media scheduling tool. There are three shaded area charts without any labels on either of the axes.
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💡Additional note: we're lucky here, the evolution is steady and gradual. With more volatile data the bars jump up and down much more, and the chart can be harder to read. Some tools enable you to connect the bars with a transparent shade, to counter this effect somewhat. (4/4)

The same stacked bar chart as in the previous posts, but with a transparent shaded area connecting the bars to better show the evolution of the individual categories.
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Profile banner
KV
Koen Van den Eeckhout
@vandeneeckhoutkoen.bsky.social
📊 Turning complex data into powerful visual stories! Author of 'Powerful Charts'. Ex-physicist. He/him 🏳️‍🌈
462 followers34 following76 posts