R tutorial 05 - Table & Bar Plot 表格与棒形图(2)

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本文通过具体的实例展示了如何使用R语言进行薪资数据的条形图绘制，并介绍了如何利用table函数来创建简单的数据频率表格。

userName <- c("Lam Wei Wei", "Zheng Da Shi", "Lin Da You", "Fei Gu Man")
salary <- c(8500, 9800, 12500, 15000)
jobPosition <- c("Staff", "Manger", "BOSS", "CEO")
bonus <- c(2300, 1350, 3285, 1035)

1. Bar chart

result <- matrix(salary,ncol=4,byrow=TRUE)

colnames(result) <- userName

barplot(result, main="Bar chart",
xlab="Name",

ylab="Salary")

2. Table function

2.1 Table
# 返回值是0~1之间
source <- c("A", "A", "B", "A", "C", "B")
results <- table(source)
print(results)

Output result:
A B C
3 2 1

2.2 matrix

# 返回值是salary值
userName <- c("Lam Wei Wei", "Zheng Da Shi", "Lin Da You", "Fei Gu Man")
salary <- c(8500, 9800, 12500, 15000)
jobPosition <- c("Staff", "Manger", "BOSS", "CEO")
bonus <- c(2300, 1350, 3285, 1035)

result <- matrix(salary,ncol=4,byrow=TRUE)

colnames(result) <- userName

barplot(result, main="Bar chart",
xlab="Name",
ylab="Salary")

Output result:

Lam Wei Wei Zheng Da Shi Lin Da You Fei Gu Man
[1,] 8500 9800 12500 15000