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#' @title Root Mean Squared Error
#'
#' @details
#' The Root Mean Squared Error is defined as \deqn{
#' \sqrt{\frac{1}{n} \sum_{i=1}^n w_i \left( t_i - r_i \right)^2}.
#' }{
#' sqrt(weighted.mean((t - r)^2, w)).
#' }
#'
#' @templateVar mid rmse
#' @template regr_template
#'
#' @inheritParams regr_params
#' @template regr_example
#' @export
rmse = function(truth, response, sample_weights = NULL, ...) {
assert_regr(truth, response = response)
sqrt(wmean(.se(truth, response), sample_weights))
}
#' @include measures.R
add_measure(rmse, "Root Mean Squared Error", "regr", 0, Inf, TRUE)
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