Build emergence dates from year × month_day combinations

Construct a vector of emergence dates by combining a set of years with a set of month-day strings (e.g., "-06-01"), returning a sorted IDate vector tagged with class epicrop.emerge for downstream use with run_epicrop_model().

Usage

build_epicrop_emergence(years, month_day)

Arguments

years

Integer vector of years (e.g., 2001:2003).

month_day

Character vector of month-day strings in the form "-MM-DD" (e.g., c("-06-01", "-06-14")). If a string is supplied without a leading dash (e.g., "06-01"), callers should normalize it in advance; this helper expects the leading - as part of the format "YYYY-MM-DD".

Value

A sorted vector of data.table::IDate emergence dates with class epicrop.emerge (i.e., inherits(x, "epicrop.emerge") will be TRUE).

See also

run_epicrop_model(), fetch_epicrop_weather_list()

Author

Adam H. Sparks, adamhsparks@gmail.com

Examples

# Basic usage: combine years with multiple month-day patterns
years <- 2001:2002
month_day <- c("-06-01", "-06-14", "-06-30")

em <- build_epicrop_emergence(years, month_day)
em
#> [1] "2001-06-01" "2001-06-14" "2001-06-30" "2002-06-01" "2002-06-14"
#> [6] "2002-06-30"

# Check class and structure
inherits(em, "epicrop.emerge")   # TRUE
#> [1] TRUE
head(em)                         # First few dates (IDate)
#> [1] "2001-06-01" "2001-06-14" "2001-06-30" "2002-06-01" "2002-06-14"
#> [6] "2002-06-30"
length(em)                       # 6 (2 years × 3 month-days)
#> [1] 6

# Typical downstream: pass to run_epicrop_model(...)
# run_epicrop_model(bacterial_blight, em, wth_list, output = "audpc")