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-
- _P_i_e _C_h_a_r_t_s
-
- piechart(x, labels=names(x), shadow=FALSE,
- edges=200, radius=0.8, fill=NULL, main=NULL, ...)
-
- _A_r_g_u_m_e_n_t_s:
-
- x : a vector of positive quantities. The values
- in x are displayed as the areas of pie
- slices.
-
- labels : a vector of character strings giving names
- for the slices.
-
- shadow : a logical vector indicating whether a shadow
- effect should be attempted for the chart.
- This only makes sense if the slices are
- filled with colors.
-
- edges : the circular outline of the pie is approxi-
- mated by a polygon with this many edges.
-
- radius : the pie is drawn centered in a square box
- whose sides range from -1 to 1. If the char-
- acter strings labeling the slices are long it
- may be necessary to use a smaller radius.
-
- col : a vector of colors to be used in filling the
- slices.
-
- main : an overall title for the plot.
-
- ... : graphical parameters can be given as argu-
- ments to piechart.
-
- _D_e_s_c_r_i_p_t_i_o_n:
-
- Pie charts are a very bad way of displaying informa-
- tion. The eye is good at judging linear measures and
- bad at judging relative areas. A bar chart or dot
- chart is a preferable way of displaying this type of
- data.
-
- _S_e_e _A_l_s_o:
-
- dotplot.
-
- _E_x_a_m_p_l_e_s:
-
- piechart(rep(1,24), col=rainbow(24), radius=0.9)
-
- pie.sales <- c(0.12, 0.3, 0.26, 0.16, 0.04, 0.12)
- names(pie.sales) <- c("Blueberry", "Cherry",
- "Apple", "Boston Cream", "Other", "Vanilla Cream")
- piechart(pie.sales,
- col=c("purple", "violetred1", "green3",
- "cornsilk", "cyan", "white")) piechart(pie.sales,
- col=gray(seq(0.4,1.0,length=6)))
-
-