add_error_calc: add an error calculation (to a pollyvote object)

In pollyvote/pollyvoter: Aggregate Components, Calculate Forecasts and Determine Errors for Election Results.

Description

Adds a prediction, so far only implemented for pollyvote objects.

Usage

add_error_calc(pv, method, fun, ...)

Arguments

pv	[pollyvote] the pollyvote object to add the data to.
method	[character(1)] name of the error calculation.
fun	[function(pv)]
...	additional arguments

Value

The pollyvote object with added prediction.

Examples

pv = create_pollyvote(perm_countries = "D")
pv = add_error_calc(pv, "poll_only", function(pv) {
  pred_data = predict(pv, "poll")
  result = get_election_result(pv, "BTW")
  joined = left_join(x = pred_data, y = result, by = "party") %>%
    rename(percent = percent.x, percent.true = percent.y)
  return(mutate(joined, error = abs(percent - percent.true)))
})

pollyvote/pollyvoter documentation built on May 25, 2019, 11:23 a.m.