我是巴西人,对不起我的英语!
我想知道某个R包中是否实现了一个函数,用于过滤前“ n”行并将剩余的行分组为“其他”行并汇总该列。
以下是我想要的示例:
library(tidyverse)
library(plotly)
library(scales)
data("lakers")
x = bind_rows(
lakers %>% count(player) %>% arrange(-n) %>% head(10),
lakers %>% count(player) %>% arrange(-n) %>% slice(11:n()) %>%
summarise(player = "Others", n = sum(n))) %>%
filter(!player == "") %>%
mutate(
player = factor(player, levels = rev(.$player)))
ggplot(x, aes(x=player, y=n))+
geom_col(fill = "DodgerBlue1", col = "DodgerBlue3")+
coord_flip()+
geom_text(aes(y=n, label = comma(n)),hjust = -.2)+
scale_y_continuous(limits = c(0, max( x$n*1.1 )))+
theme_minimal()
我需要创建一个ggplot。因此,我有一个使用dplyr的大型查询,并且我不想每次都重复查询。
我想要一些功能,例如:
head.other(x, rows = 20, fun = sum, name = "Others")
答案 0 :(得分:0)
以下是我认为可以为您提供所需功能的功能:
library(tibble)
library(dplyr)
df <- data.frame(col1 = rnorm(10), col2 = rnorm(10)) # your data frame
n <- 6 # top n rows to keep
myfun <- function(df, n) {
# seperate keep rows and those to aggregate
preserve.df <- df[1:n, ]
summarise.df <- df[(n+1):nrow(df), ]
# create new df in required format
new.df <- bind_rows(preserve.df, sapply(summarise.df, sum))
# add a column to identify the rows and return
rownames(new.df) <- c(paste0("r", 1:n), "Other")
rownames_to_column(new.df)
}
myfun(df, 6)