什么是向量？

R 金融入门

Lore Dirick

Manager of Data Science Curriculum at Flatiron School

向量与股价

apple <- 159.4

apple_stock <- c(159.4, 160.3, 161.3)
apple_stock

159.4 160.3 161.3

is.vector(apple)

TRUE

grocery <- c("apple", "orange", "cereal")

grocery

"apple" "orange" "cereal"

apple_stock <- c(159.4, 160.3, 161.3)

names(apple_stock) <- c("Monday", "Tuesday", "Wednesday")

apple_stock

Monday   Tuesday Wednesday 
 159.4     160.3     161.3

R 金融入门