鉴于此数据集:
Name Height Weight
1 Mary 65 110
2 John 70 200
3 Jane 64 115
我想把每一列(身高和体重)的限定词加起来
199 425
问题是,限定符可能不止2个(即更多)
我能做到.
# Create the dataframe people
Name <- c("Mary", "John", "Jane")
Height <- c(65,70,64)
Weight <- c(110,200,115)
people <- data.frame(Name, Height, Weight)
res <- c(sum(people$Height),sum(people$Weight))
但是当限定符增加时,它会变得太长.