Pivot the parameters passed into the function so relationships between the parameters remain consistent but giving control to providing more or less focus on extreme bins

Usage

apply_parameter_skew(params, skew, skew_method = "rotate", pivot_bin = NULL)

Arguments

params: numeric vector of parameters; assumed to be in order of increasing waiting times (bins)
skew: numeric; length 1, a multiplier to be used on the final parameter. A skew of 1 will keep the params identical to the input params. Value must be greater than 0
skew_method: character; one of "rotate" or "uniform". The "rotate" method will multiply the highest bin by the skew value, the pivot_bin will remain the same as its input, and all of the other bins between the pivot bin and the highest bin will be multiplied by an interpolated value between 1 and the skew value. Bins between the second bin and the pivot bin will be multiplied by interpolated value between (1 / skew) and 1. If the method is "uniform", then all of the bins greater than or equal to the pivot bin will be multiplied by the skew value, and the bins below the pivot bin will be multiplied by (1 / skew)
pivot_bin: numeric; when applying the skew, whichever method, select a bin to pivot around. If NULL, the mid-bin between the highest available bin and the second bin will be used. The first item of the parameter inputs is bin 0, so a pivot_bin of 2, will be the third item

Value

a revised numeric vector of parameters

Details

The skew parameter is applied to the final item of the params vector. The inverse of the skew parameter is applied to the second item of the params vector. The adjustment made to the items in between item to and item n are calculated by a linear extrapolation between the inverse skew and the skew. The first item is held constant.

Examples

apply_parameter_skew(
  params = c(0.03, 0.02, 0.02, 0.01, 0.04, 0.05),
  skew = 1.05
)
#> [1] 0.03000000 0.01904762 0.01952381 0.01000000 0.04100000 0.05250000