计算占比、将小数用百分数表示、计算分位数、排序

1.计算占比(prop.table)

trip %>%

  count(usertype) %>%

  select(n) %>%

  prop.table() %>%

  lapply(percent)

2.将小数用百分数表示(percent)

percent(0.93)

输出：93%

3.计算分位数

quantile(trip$tripduration/60, probs = c(0, 0.25, 0.5, 0.75, 1))

输出：

0%                 25%        50%            75%             100% 

1.00000    6.35000   10.93333   18.56667         436.43333 

4.排序

trip %>%

  filter(usertype == "Subscriber" & gender == "Female") %>%

  group_by(to_station_name) %>%

  summarise(n = n()) %>%

  arrange(desc(n)) %>%

  head(3) %>%

  select(n)

arrange(desc())即可用来排序

• task4.zip