The Pie Chart

The pie chart is an alternative to the one-variable bar chart. Each pie slice reflects a frequency of occurrence, analogous to a bar in a bar chart. A more readable version of a pie chart is a ring chart, a type of pie chart with no hole in the middle.

For a general presentation of using R and lessR, including examples of bar charts, select one or both of the following sources.

Palettes Addressed to Color-Blindness

Typical color palettes are not designed to account for color-blindness. Two palettes included in lessR do permit more sensitivity to differentiate among objects with various types of color blindness: Okabe-Ito and viridis. These are qualitative palettes, which means that the hue varies across the plotted objects, here slices of a pie. Specify these, or other palettes, as the value for the fill parameter, available both by entering a function call in the R console or via the interactive analysis.

Parameters

For the full list of PieChart) parameters, see the manual obtained by entering ?PieChart. These listed parameters are those provided in the interactive session from interact("PieChart").

Colors

fill
interior color of a bar
color
exterior color of a bar, i.e., its border
transparency
transparency level of 0 (none) to 1 (completely transparent)

Hole

hole
size of the hole, from 0 (none) up to 1 (no plot, nothing left)
hole_fill
color of the hole

Values

values
type of value displayed, "%" for percent, "input" for entered data values, "off" for none
values_color
color of displayed values
values_position
position of displayed values, "in" the object or "out", on top
values_size
size of the displayed values

Save

width
width of saved pdf file, in inches
height
height of saved pdf file, in inches