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Classifies Periods of Low Activity in Time Series Using Peaks and Troughs

Source: R/classify_by_low_periods.R
classify_low_periods.Rd

Identifies periods of low activity in a time series by analyzing peaks and troughs, returning a logical vector marking these periods. Low activity periods are defined as regions between consecutive troughs that contain no peaks.

Usage

classify_low_periods(peaks, troughs)

Arguments

peaks

logical vector; TRUE indicates peak positions

troughs

logical vector; same length as peaks, TRUE indicates trough positions

Value

logical vector; TRUE indicates periods of low activity

Details

The function performs the following steps:

  1. Validates input lengths

  2. Initializes all periods as potentially low activity (TRUE)

  3. For each pair of consecutive troughs:

    • If no peaks exist between them, maintains TRUE for that period

    • If any peaks exist, marks that period as FALSE (not low activity)

Examples

peaks <- c(FALSE, TRUE, FALSE, FALSE, FALSE, FALSE, FALSE)
troughs <- c(FALSE, FALSE, FALSE, TRUE, FALSE, FALSE, TRUE)
classify_low_periods(peaks, troughs)
#> [1]  TRUE  TRUE  TRUE  TRUE FALSE FALSE  TRUE