subsetContiguous: subsetContiguous
In RespChamberProc: Processing Data from Respiration Chambers

Description Usage Arguments Details Author(s)

Get contiguous subsets

1
2
3

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

`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`	additional function taking a subset of contiguous data and returning a boolean value whether it shoudl be omitted

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.

Thomas Wutzler, Oscar Perez Priego

RespChamberProc documentation built on May 2, 2019, 5:53 p.m.