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This example shows the US population over time from 1900 to 1970 on an annual basis.
The population pyramid is rendered using the HH likert
function. The Year slider can
be used either to select a year manually, or to auomatically cycle through the years.
The data is from data(USAge.table) in the latticeExtra
package.
Look for the visible effects of the First World War, the Second World War, and the Baby Boom.
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