Easiest algorithm of Voronoi diagram to implement? [closed]

An easy algorithm to compute the Delaunay triangulation of a point set is flipping edges. Since a Delaunay triangulation is the dual graph of a Voronoi diagram, you can construct the diagram from the triangulation in linear time. Unfortunately, the worst case running time of the flipping approach is O(n^2). Better algorithms such as Fortune’s … Read more

Sankey Diagrams in R?

This plot can be created through the networkD3 package. It allows you to create interactive sankey diagrams. Here you can find an example. I also added a screenshot so you have an idea what it looks like. # Load package library(networkD3) # Load energy projection data # Load energy projection data URL <- paste0( “https://cdn.rawgit.com/christophergandrud/networkD3/”, … Read more

Why is a database always represented with a cylinder? [closed]

I’m reasonably certain that it predates disk drives, and goes back to a considerably older technology: drum memory: Another possibility (or maybe the choice was based on both) is a still older technology: mercury tank memory: You may have seen the symbol oriented horizontally instead of vertically, but horizontal drums were common as well:

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