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fdasrvf (version 2.3.6)

ampbox_data: Amplitude Boxplot Data

Description

This function constructs the amplitude boxplot.

Usage

ampbox_data(warp_median, alpha = 0.05, ka = 1)

Value

Returns an ampbox object containing:

  • median_y: median function

  • Q1: First quartile

  • Q3: Second quartile

  • Q1a: First quantile based on alpha

  • Q3a: Second quantile based on alpha

  • minn: minimum extreme function

  • maxx: maximum extreme function

  • outlier_index: indexes of outlier functions

  • fmedian: median function

Arguments

warp_median

fdawarp object from time_warping() of aligned data using the median

alpha

quantile value (default=.05, i.e., 95%)

ka

scalar for outlier cutoff (default=1)

References

Xie, W., S. Kurtek, K. Bharath, and Y. Sun (2016). "A geometric approach to visualization of variability in functional data." Journal of the American Statistical Association in press: 1-34.