向tibble数据框添加行，以便每个组具有相同数量的观察值

install.packages("tibble")

library(tibble)
df <- tibble()

df <- df %>% add_row(column1 = value1, column2 = value2, ...)

df <- df %>% group_by(group) %>% do(add_row(., column1 = value1, column2 = value2, ...))

library(tibble)

# 创建一个空的tibble数据框
df <- tibble()

# 添加观察值到数据框中
df <- df %>% add_row(group = "A", value = 1)
df <- df %>% add_row(group = "A", value = 2)
df <- df %>% add_row(group = "B", value = 3)

# 使用group_by()和do()为每个组添加相同数量的观察值
df <- df %>% group_by(group) %>% do(add_row(., group = .$group[1], value = 4))
df <- df %>% group_by(group) %>% do(add_row(., group = .$group[1], value = 5))

# 输出结果
df