Sample Applets Using The GPL:
Note: The icon provides a link to instructions for using the applets!

The Barley Data

In this classic example from W.S. Cleveland's Visualizing Data we see varieties of barley from different counties from 1931 and 1932. Use the Pan & Zoom tool to navigate so that Morris county is showing. You should see something curious here. Do you see the problem? Try moving the 1931 data on top of the 1932 data by drag and drop. See the problem now? Hint: compare the pattern of the data from the two years in Morris vs. the rest of the counties.

The data here comes from the EPA. You can compare pollution levels by moving the panels around or drag and drop bars from one panel to another. Note that the totals for Texas and Louisiana are off the scale. You can click on the axis for "Total" and "zoom out" so the ends of the bars are visible.

The data in this example comes from the Current Population Survey (CPS). It is comparable to the first three graphs in the Economic Briefing Room provided by the White House. Notice that with the GPL version, you can adjust the view to suit your needs. Also notice the red triangles marking the begining and end of a recession, and the change in the CPS survey design. You can right-mouse on these points to obtain more information.

The data in this example comes from the Consumer Price Index (CPI) and the seven major component indices. The most visually interesting index is Apparel and Upkeep because of the seasonality. Try clicking on different months in the "Highlight Month" control to examine the trends. Also, you may want to compare the individual indices to the overall CPI by dragging them onto the CPI panel. Note how rich this graph is with metadata. You can right-mouse on virtually anything on the graph to get much more information. Finally, note the buttons in the lower left that allow you to choose whether to look at the raw index, percent change, or seasonally adjusted values. Be patient, the data in this one takes a bit to download!