summarise(count=n()) ## `summarise()` has grouped output by 'ps_level', 'w3momed_hsb'. You ## can override using the `.groups` argument. ## # A tibble: 14 × 4 ## # Groups: ps_level, w3momed_hsb [7] ## ps_level w3momed_hsb catholic count ## <chr> <fct> <fct> <...
delay1 <- summarise(by_dest, count=n(), #生成一个计数列 dist=mean(distance,na.rm=TRUE), delay=mean(arr_delay,na.rm=TRUE), ) #计算距离均值和延误时间均值 delay1 #查看表内容 #运行: # A tibble: 105 x 4 dest count dist delay <chr> <int> <dbl> <dbl> 1 ABQ 254 1826 4.38 2 ...
msleep%>%summarise(n=n(),average=mean(sleep_total),maximum=max(sleep_total)) ## # A tibble:1x3## n average maximum ##<int><dbl><dbl>##18310.419.9 group_by( )按分组进行汇总 msleep%>%group_by(vore)%>%summarise(n=n(),average=mean(sleep_total),maximum=max(sleep_total)) ## # A...
gapminder %>% count(year, continent, name = 'cnt', sort = TRUE) 1. 2. 3. 4. 5. 当然也可以使用 group_by 和 summarise 函数实现上述计数的统计,此时需使用 n() 函数,有时候我们需要去重计数,实现类似于 count distinct 的功能,这时可以使用 n_distinct 函数。 #按 year 分组计数, 与 count 等价...
delay1<-summarise(by_dest,count=n(),#生成一个计数列 dist=mean(distance,na.rm=TRUE),delay=mean(arr_delay,na.rm=TRUE),)#计算距离均值和延误时间均值 delay1 #查看表内容 #运行:# A tibble: 105 x 4dest count dist delay<chr><int><dbl><dbl>1ABQ25418264.382ACK2651994.853ALB43914314.44ANC83370...
delay_sum <- summarise(by_dest, count = n(),#统计各分组目的地的航班数 dist = mean(distance, na.rm = TRUE),#计算平均航行距离 delay = mean(arr_delay, na.rm = TRUE))#计算平均延误时间 delay_sum <- arrange(delay_sum, desc(count)) #按照航班数降序排列 ...
# 计算评价程度的占比data2 = data%>% pivot_longer(cols = !id, names_to = 'ques', values_to = 'level')%>% group_by(ques,level)%>% summarise(count = n())%>% ungroup(level)%>% mutate(prop = count/sum(count)) 计算后的结果如下: ...
summarise(count=n()) 1. 2. 3. 4. ## `summarise()` has grouped output by 'ps_level', 'w3momed_hsb'. You ## can override using the `.groups` argument. 1. 2. ## # A tibble: 14 × 4 ## # Groups: ps_level, w3momed_hsb [7] ...
则根据分组变量分组计算...为计算函数,可以是一个也可以是多个,多个的话以逗号分割summarise(data,disp=mean(disp),hp=mean(hp))summarise计算函数Useful functions拓展Center:mean(),median()Spread:sd(),IQR(),mad()Range:min(),max(),quantile()Position:first(),last(),nth(),Count:n(),n_distinct()...
flights%>%group_by(tailnum)%>%filter(cumall(dep_delay<60))%>%summarise(n=n())解释一下：因...