2.2.5 basic sentences of R language drawing

PART1 About the drawing of pie chart

function ：pie() 

The basic syntax is ：pie(x, labels = names(x),col =(),main = NULL )

among x Is a data vector ,labels = names(x) Label the area of each sector ,col =() Used to set the color of each sector ,main = NULL Used to set the title of the pie chart , If the title is in Chinese, it needs to be suffixed family='GB1'

for instance ：

# Data preparation
info = c(1, 2, 4, 8)
# name
names = c("Google", "Runoob", "Taobao", "Weibo")
# Coloring （ Optional ）
cols = c("#ED1C24","#22B14C","#FFC90E","#3f48CC")
# Calculate percentage
piepercent = paste(round(100*info/sum(info)), "%")
# mapping
pie(info, labels=piepercent, main = " Website analysis ", col=cols, family='GB1')
# Add color sample annotation
legend("topright", names, cex=0.8, fill=cols)

The final output is ：

When we want to draw a three-dimensional pie chart, we need to use pie3D() function , At this time, you need to input the instruction first ：install.packages("plotrix", repos = "https://mirrors.ustc.edu.cn/CRAN/") Install drawing expansion pack