Local Maxima

This function finds local maxima in a numeric vector. A local maximum is defined as maximum in a window of the current index +/- hws.

Usage

localMaxima(x, hws = 1L)

Arguments

x

numeric, vector that should be searched for local maxima.

hws

integer(1), half window size, the resulting window reaches from (i - hws):(i + hws).

Value

A logical of the same length as x that is TRUE for each local maxima.

See also

Other extreme value functions: .peakRegionMask(), refineCentroids(), valleys()

Author

Sebastian Gibb

Examples

x <- c(1:5, 4:1, 1:10, 9:1, 1:5, 4:1)
localMaxima(x)
#>  [1] FALSE FALSE FALSE FALSE  TRUE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
#> [13] FALSE FALSE FALSE FALSE FALSE FALSE  TRUE FALSE FALSE FALSE FALSE FALSE
#> [25] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE  TRUE FALSE FALSE FALSE
#> [37] FALSE
localMaxima(x, hws = 10)
#>  [1] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
#> [13] FALSE FALSE FALSE FALSE FALSE FALSE  TRUE FALSE FALSE FALSE FALSE FALSE
#> [25] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
#> [37] FALSE