Microsoft Office Tutorials and References
In Depth Information
Pie charts
an optical illusion that makes it impossible to discern the order of the line series
across the depth axis.
Pie charts
A pie chart is useful when you want to show relative proportions or contributions
to a whole. A pie chart can use only one data series. Pie charts are most effective
with a small number of data points. Generally, a pie chart should use no more than
five or six data points (or slices). A pie chart with too many data points can be very
difficult to interpret.
The values used in a pie chart must all be positive numbers. If you create a
pie chart that uses one or more negative values, the negative values will be
converted to positive values — which is probably not what you intended!
Figure 2-9: This line chart uses three series.
Figure 2-10: This 3-D line chart is not a good choice
for this data.
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