calculate overlap date in r

To calculate the overlap between two date ranges in R, you can use the int_overlaps() function from the intervals package. Here is some example code:


main.r
library(intervals)

# create two date ranges
range1 <- Intervals(as.Date(c("2021-01-01", "2021-01-10")), closed=2)
range2 <- Intervals(as.Date(c("2021-01-05", "2021-01-15")), closed=2)

# calculate overlap
overlap <- int_overlaps(range1, range2)

# print result
print(overlap)
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This will output the overlapped date range as an Intervals object:


main.r
Intervals:
  [,1]        [,2]       
  [1,] 2021-01-05 2021-01-10
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If you want to do this with data frames using dplyr, you can use the int_overlap() function from the intervals package. Here is a code snippet that demonstrates how to calculate the overlap for each row in a data frame:


main.r
library(intervals)
library(dplyr)

# create sample data frame
df <- data.frame(start1 = as.Date(c("2021-01-01", "2021-01-05", "2021-01-14")),
                 end1 = as.Date(c("2021-01-10", "2021-01-15", "2021-01-20")),
                 start2 = as.Date(c("2021-01-03", "2021-01-07", "2021-01-12")),
                 end2 = as.Date(c("2021-01-08", "2021-01-18", "2021-01-16")))

# calculate overlap for each row
df <- df %>%
  mutate(overlap = int_overlap(
    Intervals(cbind(start1, end1)), 
    Intervals(cbind(start2, end2))
  ))

# print result
print(df)
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This will add a new column, overlap, to the data frame containing the overlapped date range for each row, as an Intervals object.


main.r
      start1       end1     start2       end2                                overlap
1 2021-01-01 2021-01-10 2021-01-03 2021-01-08           [,1]        [,2]
  [1,] 2021-01-03 2021-01-08
2 2021-01-05 2021-01-15 2021-01-07 2021-01-18 [1,] 2021-01-07 2021-01-15
3 2021-01-14 2021-01-20 2021-01-12 2021-01-16 [1,] 2021-01-14 2021-01-16
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