下面的代码和数据源主要来自:https://stackoverflow.com/questions/51063842/create-multiple-columns-in-summarize,以计算分位数为例。 > library(dplyr) > library(tidyr) > > Z<-data.frame(x=runif(1000,min=0,max=20))%>% + mutate(y = rnorm(n(), mean = sin(x))) %>% + group_by(x.cat...
4 Count occurence across multiple columns using R & dplyr 2 Count using dplyr 2 Count multiple columns and group by in R 2 How do I get count from multiple columns in R? 1 Count the number of columns in a row with a specific value 0 Count number of occurences for every column...
听起来像是anti_join(),例如。
Aggregation / update on multiple columns # case (a) DT[, lapply(.SD, sum), by = z] ## data.table syntax DF %>% group_by(z) %>% summarise_each(funs(sum)) ## dplyr syntax DT[, (cols) := lapply(.SD, sum), by = z] ans <- DF %>% group_by(z) %>% mu...
group_by(g) %>%reframe(x = intersect(x, table))#> # A tibble: 5 × 2#> g x#> <dbl> <chr>#> 1 1 a#> 2 1 b#> 3 2 f#> 4 2 d#> 5 2 a# You can add multiple columns at once using a single expression by returning# a data frame.quantile_df <-function(x, probs ...
使用rowSums对每行求和(rowwise适用于任何聚合,但速度较慢)
#gather Gather columns into key-value pairs;students2为数据集,grade为第一列,不参与gather;剩下的列名及数据作为键值对放入sex_class(key)和count(value)下。 接下来seperate将sex_class列分成俩列。separate :Separate one column into multiple columns. ...
cur_group() and cur_group_id() two-table verbs 合并连接 筛选连接 集合操作 合并连接 筛选连接 集合操作 column-wise operations 陷阱 across其他连用 和filter()连用 row-wide operations 简介 对行进行汇总统计 list columns motivation subsetting modeling repeated function calls simulations multiple combinations...
使用rowSums对每行求和(rowwise适用于任何聚合,但速度较慢)
或者,如果我们只需要使用tidyverse函数,则将其转换为'long'格式,其中包含gather,summarize和row,并获得...