Filter Data by Time Period — filter_by

Filters ISTAT data by a specified time period. Handles different date formats based on frequency (A=Annual, Q=Quarterly, M=Monthly) when filtering raw data.

Usage

filter_by_time(
  data,
  start_date = NULL,
  end_date = NULL,
  time_col = "ObsDimension"
)

Arguments

data: A data.table with time information
start_date: Date or character string specifying start date (e.g., "2020-01-01")
end_date: Date or character string specifying end date
time_col: Character string specifying the time column name. Default is "ObsDimension" for raw ISTAT data.

Value

Filtered data.table

Examples

if (FALSE) { # \dontrun{
# Filter raw data from 2020 onwards
filtered_data <- filter_by_time(data, start_date = "2020-01-01")

# Filter quarterly data
q_data <- download_istat_data_by_freq("151_914")$Q
filtered_q <- filter_by_time(q_data, start_date = "2024-01-01")
} # }