Find overlapping selections

ovlp_sels finds which selections overlap in time within a given sound file.

ovlp_sels(X, index = FALSE, pb = TRUE, max.ovlp = 0, relabel = FALSE,
drop = FALSE, priority = NULL, priority.col = NULL, unique.labs = TRUE,
indx.row = FALSE, parallel = 1)

Arguments

X	'selection_table' object or data frame with the following columns: 1) "sound.files": name of the .wav files, 2) "selec": number of the selections, 3) "start": start time of selections, 4) "end": end time of selections. The output of manualoc or autodetec can be used as the input data frame. Other data frames can be used as input, but must have at least the 4 columns mentioned above.
index	Logical. Indicates if only the index of the overlapping selections would be returned. Default is FALSE.
pb	Logical argument to control progress bar and messages. Default is TRUE.
max.ovlp	Numeric vector of length 1 specifying the maximum overlap allowed (in seconds) . Default is 0.
relabel	Logical. If TRUE then selections names (selec column) are reset within each sound files. Default is FALSE.
drop	Logical. If TRUE, when 2 or more selections overlap the function will remove all but one of the overlapping selection. Default is FALSE.
priority	Character vector. Controls the priority criteria used for removing overlapped selections. It must list the levels of the column used to determine priority (argument priority.col) in the desired priority order. Default is NULL.
priority.col	Character vector of length 1 with the name of the column use to determine the priority of overlapped selections. Default is NULL.
unique.labs	Logical to control if labels are reused across different sound files (if TRUE, default).
indx.row	Logical. If TRUE then a character column with the indices of all selections that overlapped with each selection is added to the ouput data frame (if index = TRUE). For instance, if the selections in rows 1,2 and 3 all overlapped with each other, the 'indx.row' value would be "1/2/3" for all. However, if selection 3 only overlaps with 2 but not with 1, then it returns, "1/2" for row 1, "1/2/3" for row 2, and "2/3" for row 3. Default is FALSE.
parallel	Numeric. Controls whether parallel computing is applied. It specifies the number of cores to be used. Default is 1 (i.e. no parallel computing).

Value

A data frame with the columns in X plus an additional column ('ovlp_sels') indicating which selections overlap. The ones with the same number overlap with each other. If drop = TRUE only the non-overlapping selections are return. If 2 or more selections overlap only the first one is kept.

Details

This function detects selections within a selection table that overlap in time. Selections must be listed in a data frame similar to lbh_selec_table. Note that row names are set to 1:nrow(X).

References

Araya-Salas, M., & Smith-Vidaurre, G. (2017). warbleR: An R package to streamline analysis of animal acoustic signals. Methods in Ecology and Evolution, 8(2), 184-191.

See also

filtersels lbh_selec_table

Examples

{
#no overlap
ovlp_sels(X =  lbh_selec_table)

# modified lbh_selec_table to make the first and second selection overlap
Y <- lbh_selec_table
Y$end[4] <- 1.5

 ovlp_sels(X =  Y)

# drop overlapping
 ovlp_sels(X =  Y, drop = TRUE)

# get index instead
 ovlp_sels(X =  Y, index = TRUE)
}
#> [1] 4 5