icesVMS (version 1.1.4)

sum_distinct_vessels: Add together anonymous ID entries

Description

Anonymous vessel IDs are supplied when there are less than 2 vessels. Therefore when adding these values, if there is one or more values containing an empty string (? 2 vessels) then the results is an empty string also. Otherwise, a unique vector of vessel IDs is computed and if there are 2 or less unique entries they are returned, otherwise an empty string is returned.

Usage

sum_distinct_vessels(id, n)
sum_vessel_ids(id, n)

Value

a single character

Arguments

id

a vector vessel Ids entries: string vector of semi-colon separated IDs

n

a vector corresponding to the number of unique vessel ids in the vector supplied in id where 3 codes for anything greater than 2.

Examples

sum_vessel_ids(c("id1;id2", "id1", "id2", "id1;id3", ""), c(2, 1, 1, 2, 3))
sum_vessel_ids(c("id1;id2", "id1", "id2", "id1;id3"), c(2, 1, 1, 2))


sum_distinct_vessels(c("id1;id2", "id1", "id2", "id1;id3", ""), c(2, 1, 1, 2, 3))
sum_distinct_vessels(c("id1;id2", "id1", "id2", "id1;id3"), c(2, 1, 1, 2))

if (FALSE) {
require(dplyr)

data(vms)
vms <-
  vms %>%
  group_by(year, cSquare) %>%
  summarise(
    fishingHours = sum(fishingHours, na.rm = TRUE),
    totweight = sum(totweight, na.rm = TRUE),
    noDistinctVessels = sum_distinct_vessels(anonymizedVesselID, noDistinctVessels),
    anonymizedVesselID = sum_vessel_ids(anonymizedVesselID, noDistinctVessels),
    .groups = "drop"
  )
}