Teaching:TUW - UE InfoVis WS 2008/09 - Gruppe 07 - Aufgabe 1 - Pie Chart
Pie Charts
Definition
A pie chart is a circular chart divided into sectors, illustrating relative magnitudes or frequencies or percents. In a pie chart, the size of each sector is proportional to the quantity it represents. Together, the sectors create a full disk. It is named for its resemblance to a pie which has been sliced.
A type of chart divided into sections of a circle, drawn from a single Y-axis value and used to illustrate the relationship of parts to the whole, particularly useful for emphasizing one specific element.
QUOTATIONS, ANYONE?
How to use it
Determine proportions. Find the total value for the entire category being studied and calculate the percentage for each segment or part.
Calculate degress. Convert the percentage values for each segment into degrees relative to the 360 degrees in the circle. (For example, 12% X 360 degrees = 43 degrees)
Construct the chart. Draw a circle and divide it into appropriately sized segments. Add labels and a title. Label each segment or add a legend to identify the segments. Then clearly title the chart.
Example
SUBPARAGRAPH1
PARAGRAPH2
- Entry1
- Entry2
PARAGRAPH3
[Phothographer]
REFERENCES / WEBLINKS
- [Hull, 1998] Stephen Hull, BusinessObjects Glossary. Last Modified at: November 5, 1998. Retreived at: November 4, 2008 http://planning.ucsc.edu/IRPS/dwh/BOBGLOSS.HTM
- [Concordia University, 1999] Unknown, Pie Chart. Last Modified at: 1999. Retrieved at: November 4, 2008 http://web2.concordia.ca/Quality/tools/21piechart.pdf
- [Anonymous, 2008] John Doe. Unknown Paper. Wikipedia, http://en.wikipedia.org/wiki/Reference