## Monday, April 29, 2013

### Kernel Pinterest

Here is a nice idea for displaying a bit more than summary statistics on the variables included in regression studies. This is from the paper "I Need to Try This!": A Statistical Overview of Pinterest. Pinterest is a pin-board photo sharing website. Among other things, this study models the number of re-pins of a given photo with a Negative-Binomial regression.

The table above shows the medians, means, and maxima for non-negative count data included in the regressions. The minima are all zero. Along with these summary statistics are small thumb-nail kernel density estimates of the distributions of the variables. Now granted the variables involved take on only integer values and these distribution curves are continuous, but it is much better than the usual limited summary statistics, shown below, that are often given in other regression studies.

## Monday, April 22, 2013

### Venn Disease

From the New York Times, dynamic Venn diagrams about diseases of the elderly.
A Venn diagram based on data from the study, by the National Center for Health Statistics in 2010, shows just how often these three conditions [high blood pressure, heart disease, and Alzheimer's disease] coincide in patients, and why this overlap is becoming an important new field of study.

## Monday, April 15, 2013

### Gumshoe

Tim Horton's Coffee and Bake Shop on W 34th Street near 7th Avenue sits at a transportation hub for New York City. Penn Station is a block away, out of town buses load and unload nearby, city buses and taxis, prevalent throughout the city, cluster here to serve the new arrivals. People also wait for the same trains, buses, and taxis. To enjoy their fresh coffee and donut during their wait they must discard their chewing gum. Unfortunately, for hygiene but fortunately for us, they drop it on the sidewalk. These sticky discards darken as they age, collecting dirt and grime and displaying a scatterplot of these messy leavings. Many wads have been dropped near the shop's window and fewer in less concentrated semi-circular arcs moving away from the window. The window seems to be the central point for some transportation queue. Here is left on the sidewalk another truncated view of a circular scatterplot of impatient deposits.