Aggregate covariates

Description

Aggregates a data frame containing a covariate of interest in space and/or time.

aggregate_cov(
  data = NULL,
  var = NULL,
  time = NULL,
  area = NULL,
  aggregate_space = NULL,
  aggregate_time = NULL,
  aggregate_space_fun = "mean",
  aggregate_time_fun = "mean"
)

Arguments

• data: Data frame containing equally spaced (daily, weekly, monthly) incident cases for one or multiple areas.
• var: Name of the variable that identifies the covariate.
• time: Name of the variable that identifies the temporal dimension. The values must be in date format (“yyyy-mm-dd”) representing the date of observation for daily data, the first day of the week for weekly, or the first day of the month for monthly observations.
• area: Name of variable that identifies the different locations (i.e., areal units) for which a time series is available.
• aggregate_space: Name of variable used to define spatial aggregation groups.
• aggregate_time: Temporal scale used to perform temporal aggregation. Options are: “week” (ISO 8601), “month”, “year”.
• aggregate_space_fun: Character indicating the function to be used in the aggregation over space, default is “mean”.
• aggregate_time_fun: Character indicating the function to be used in the aggregation over time, default is “mean”.

Returns

A data frame with the aggregated covariate.