jqPlot is free and open source. It was developed by Chris Costello in 2009. It is possible to download it from the official site and it does not require any registration.
Delighting as ever with thousands of electronic components around my Arduino board, I’m realizing only now how the colored jumper wires of various lengths, that I recently purchased online at various sites of robotics, are practical.
Dendrograms are a very useful tool of data visualization, especially for the cluster analysis or clustering. The dendrogram is essentially a tree graph.