description
A pie chart represents one dimensional categorical data of positive numbers only. The angle of each sector is proportional to the value of the corresponding category. It is useful when fractions of a whole (especially percentages) are to be shown for a few categories (5-7) and the focus is on large differences among categories rather than nuances.
However, changes are hard to perceive on a pie chart, and should be used only for static data. Furthermore, small values are difficult to distinguish or notice and therefore, avoid using pie charts when the data spans multiple orders of magnitude.
However, changes are hard to perceive on a pie chart, and should be used only for static data. Furthermore, small values are difficult to distinguish or notice and therefore, avoid using pie charts when the data spans multiple orders of magnitude.