subsetContiguous: subsetContiguous

In bgctw/RespChamberProc: Processing Data from Respiration Chambers

subsetContiguous

Description

Get contiguous subsets

Usage

subsetContiguous(ds, colTime = "TIMESTAMP", 
    colIndex = "Collar", colMeasure = "CO2_dry", 
    gapLength = 12, minNRec = 20, minTime = 60, 
    indexNA = 0, fIsBadChunk = function(dsi) FALSE)

Arguments

ds	data.frame or tibble of measurements
colTime	column name that of time (POSIXct)
colIndex	column name of index variable (factor or integer)
colMeasure	column name of the concentration measurement
gapLength	minimal length of a gap between subsets (seconds)
minNRec	minimum number of records within one contiguous subset
minTime	minimum length of time (in seconds) that a contiguous subsets covers
indexNA	value of the index column, that signifies records not to use
fIsBadChunk

Details

The time series in logger data consists of several chunks of concentration measurments. In order to determine these chunks, either a change in an index variable (input by between the measurements) or a gap in time is used.

Between the actual series of measurements, the logger may record sparse data. These chunks are indicated by value indexNA in the index column or by shortness of the series. Only chunks with at least minNRec records and at least minTime seconds are reported. Others are neglected.

Value

Argument ds with between-Chunk rows omitted and an additional integer column iChunk that designates the chunk number.

Author(s)

Thomas Wutzler, Oscar Perez Priego

bgctw/RespChamberProc documentation built on Jan. 4, 2024, 6:12 a.m.