我有一个包含两列timestamps和value的时间序列数据：

as.data.table(structure(list(timestamp = c("2023-10-04 09:59:58", "2023-10-04 10:02:58", 
"2023-10-04 10:05:58", "2023-10-04 10:08:58", "2023-10-04 10:11:58", 
"2023-10-04 10:14:58", "2023-10-04 10:17:58"), value = c(1, 2.5, 
4, 5.5, 7, 8.5, 10)), row.names = c(NA, -7L), class = c("data.table", 
"data.frame")))

我试图找到平均值在每15分钟的时间间隔

library(tidytable)
library(dplyr)
averaged_df <- df %>%
  group_by(interval = floor_date(timestamp, "15 minutes")) %>%
  summarise(average_value = mean(value))

group_by()中的错误：在论证中：interval = floor_date(timestamp, "15 minutes")。由floor_date()中的错误引起：！找不到函数“floor_date”
如果没有tidytable，它可以按预期工作，但当加载tidytable时，它会给出上述错误。