Of all the open source developer visualization tool kits I’ve seen so far, the one I stumbled upon today (thanks Moritz Stefaner), named Protovis, seems the most practical and easy to use. Protovis comes from Stanford’s visualization group, with the help of Jeff Heer and Michael Bostock.
Below is a screen grab of some of the visualizations created using Protovis.
While there are some graphs in the examples that we might want to stay away from, those radial fan (sunburst?) type charts are just plain confusing, I think the ability …
Below is a data set with 4 groupings of data and 2 columns for each grouping. The summary statistics–mean, variance, correlation, sum of squares, r², and linear regression line are the same for all 4 groupings of X and Y values. If we stopped our analysis here we could move forward confidently knowing that the 4 groups of data are the same. And we’d be dead wrong.
In my 15 years in analytics I’ve seen good analysts, time and again, stop their analytical efforts when their data summaries don’t tell a …