Larger percentages of artifact types are illustrated with longer bar snippets and smaller percentages with shorter bar snippets.A good source of information about how to make charts in Excel is Ted French's Excel Chart Tutorial (for several different versions of Excel).What this step does is create a visual representation of the qualities of the artifacts, and their co-occurrence at different junkyards.
The gramophone dragged a needle in a spiral groove at a rate of 78 revolutions per minute (rpm).
The seriation method works because object styles change over time; they always have and always will.
A good example of a change in artifact type is the development of hand-held PDAs from those first enormous cell phones. As an example of how change through time works, consider the different music recording methods that were used in the 20th century.
The figure on this page is a Microsoft Excel (TM) table showing the results of our frequency count.
Our next step is to create a bar graph of the percentages of the objects in our junkyard samples.