There are many visualization techniques, or chart types. These articles describe what they are, how they work, and what they are good for.

  • Sets of Possible Occurrences

    SOPOView Screenshot - Peter Messner Visual representations of time are particularly interesting, because they seem so logical. A point in time is a point in the visualization, an interval is a line. But things are not always that simple: planning and temporal uncertainty require more powerful visual tools. Sets of Possible Occurrences (SOPOs) are an example of a visual representation of time that is very flexible and powerful – and totally unintuitive.

  • Women in IT – Squaring the Pie?

    Square Pie Chart from Diagrams Collection Pie charts are a ubiquitous way of showing percentages. But while we can see differences in angles quite well, reading the meaning of the difference is another matter, so for precise data, we still need the numbers. A little known variant of pie charts is not round, but square, and can be read with an accuracy of one percent. We will look at data on women in information technology using this method.