ChangePointTaylor (version 0.3)

change_point_analyzer: change_point_analyzer

Description

a simple implementation of the change in mean detection methods developed by Wayne Taylor and utilized in his Change Point Analyzer software. The package recursively uses the 'MSE' change point calculation to identify candidate change points. Taylor's backwards elimination process is then employed to come up with a final set of change points.

Usage

change_point_analyzer(
  x,
  labels = NA,
  n_bootstraps = 1000,
  min_candidate_conf = 0.5,
  min_tbl_conf = 0.9,
  CI = 0.95
)

Value

a dataframe containing the change points, their confidence levels, and other relevant information

Arguments

x

a numeric vector

labels

a vector the same length as x. Will generate labels for the change points in the output dataframe.

n_bootstraps

an integer value. Determines the number of bootstraps when calculating the change confidence level.

min_candidate_conf

a value between 0 and 1. The minimum change confidence level to become a candidate change point before re-estimation and backwards elimination.

min_tbl_conf

a value between 0 and 1. The minimum change confidence level below which a candidate change point will be eliminated after re-estimation and backwards elimination.

CI

a value between 0 and 1. The value of the confidence interval.

References

Taylor, W. A. (2000). Change-point analysis: a powerful new tool for detecting changes.

Examples

x <- US_Trade_Deficit$deficit_billions
label_vals <- US_Trade_Deficit$date

change_point_analyzer(x)

change_point_analyzer(x, label = label_vals)

change_point_analyzer(x, label = label_vals, n_bootstraps = 10000)

change_point_analyzer(x, label = label_vals, min_candidate_conf = 0.66,  min_tbl_conf = 0.95)