I really don't like stacked bar charts - they have so many inherent problems. But sometimes, they are, in fact, the best chart for the job. But when I design a stacked bar chart, I take numerous steps to make the chart the most insightful and easy to understand as possible. I've spoken about many of these techniques in past blog post and presentations and I will refer to those today, plus I'll add in one technique that I think takes it to the next level - allowing a user to toggle between con...
