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Exposed data frame helper functions

Source: R/exposed_df_helpers.R
is_exposed_df.Rd

Test for and coerce to the exposed_df class.

Usage

is_exposed_df(x)

as_exposed_df(
  x,
  end_date,
  start_date = as.Date("1900-01-01"),
  target_status = NULL,
  cal_expo = FALSE,
  expo_length = c("year", "quarter", "month", "week"),
  trx_types = NULL,
  col_pol_num,
  col_status,
  col_exposure,
  col_pol_per,
  cols_dates,
  col_trx_n_ = "trx_n_",
  col_trx_amt_ = "trx_amt_",
  default_status
)

Arguments

x

An object. For as_exposed_df(), x must be a data frame.

end_date

Experience study end date

start_date

Experience study start date. Default value = 1900-01-01.

target_status

Character vector of target status values. Default value = NULL.

cal_expo

Set to TRUE for calendar year exposures. Otherwise policy year exposures are assumed.

expo_length

Exposure period length

trx_types

Optional. Character vector containing unique transaction types that have been attached to x. For each value in trx_types, as_exposed_df requires that columns exist in x named trx_n_{*} and trx_amt_{*} containing transaction counts and amounts, respectively. The prefixes "trx_n_" and "trx_amt_" can be overridden using the col_trx_n_ and col_trx_amt_ arguments.

col_pol_num

Optional. Name of the column in x containing the policy number. The assumed default is "pol_num".

col_status

Optional. Name of the column in x containing the policy status. The assumed default is "status".

col_exposure

Optional. Name of the column in x containing exposures. The assumed default is "exposure".

col_pol_per

Optional. Name of the column in x containing policy exposure periods. Only necessary if cal_expo is FALSE. The assumed default is either "pol_yr", "pol_qtr", "pol_mth", or "pol_wk" depending on the value of expo_length.

cols_dates

Optional. Names of the columns in x containing exposure start and end dates. Both date ranges are assumed to be exclusive. The assumed default is of the form A_B. A is "cal" if cal_expo is TRUE or "pol" otherwise. B is either "yr", "qtr", "mth", or "wk" depending on the value of expo_length.

col_trx_n_

Optional. Prefix to use for columns containing transaction counts.

col_trx_amt_

Optional. Prefix to use for columns containing transaction amounts.

default_status

Optional scalar character representing the default active status code. If not provided, the most common status is assumed.

Value

For is_exposed_df(), a length-1 logical vector. For as_exposed_df(), an exposed_df object.

Details

is_exposed_df() will return TRUE if x is an exposed_df object.

as_exposed_df() will coerce a data frame to an exposed_df object if that data frame has columns for policy numbers, statuses, exposures, policy periods (for policy exposures only), and exposure start / end dates. Optionally, if x has transaction counts and amounts by type, these can be specified without calling add_transactions().

See also

expose() for information on how exposed_df objects are typically created from census data.