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Dates can be filtered in R using the subset() function or the dplyr package.

Using subset() function:

# Creating a dataframe with dates
data <- data.frame(
  date = as.Date(c("2021-01-01", "2021-01-02", "2021-01-03", "2021-01-04")),
  value = c(10, 20, 30, 40)
)

# Filtering dates between Jan 2 and Jan 3
subset(data, date >= as.Date("2021-01-02") & date <= as.Date("2021-01-03"))

Using dplyr package:

library(dplyr)

# Creating a dataframe with dates
data <- data.frame(
  date = as.Date(c("2021-01-01", "2021-01-02", "2021-01-03", "2021-01-04")),
  value = c(10, 20, 30, 40)
)

# Filtering dates between Jan 2 and Jan 3
data %>% filter(date >= as.Date("2021-01-02") & date <= as.Date("2021-01-03"))