In tekknosol/glimmr: Gas Fluxes and Dynamic Chamber Measurements

knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>"
)

This vignette summarises the options for setting up options specified with analyzer().

Gas analyzer

time_stamp Column containing a timestamp.
conc_columns A named vector declaring the columns containing the actal mixing rations. E.g. c(CO2 = "CO2").
pressure Column containing the atmospheric preasure in mbar.
pressure_factor If preasure is provided in a different unit than mbar, a conversion factor can be specified.
temperature Column containing the temperature in °C

Meta data

manual_temperature Column conatining an additional measured temperature. If specified, the temperature value is ommited.
offset (Default = 0:0). Colon separated value for offsetting the datasets. First value offsets the first, second value offsets the last datapoint. Positive values shrinken the dataset i.e 2:3 skips two datapoints at the beginning and truncates three datapoints at the end of the dataset. Negative values expand the dataset i.e. -2:-3 add two datapoints at the beginning and three datapoints at the end of the dataset.

Alternatively name of column containing the value for each measurement individually (e.g. offset).
duration_count If TRUE, end is determined by the number of datapoints within each measurement. If FALSE, end is treated as duration or point in time.
spot (Default = "spot"). Column containing the ID of the measurement location.
day (Default = "day"). Column containing the day of measurement. Format: "YYYY-MM-DD".
start (Default = "start"). Column containing the start of measurement. Format: "HH:MM" or "HH:MM:SS"
end (Default = "end"). Column containing the end of measurement. There are several options:

Point in Time. Format: "HH:MM" or "HH:MM:SS" (e.g. "13:43").

Duration in minutes (e.g. 5).

Number of Datapoints regardless of the effectively elapsed time (e.g. 10). This behaviour is controlled by duration_count.

Alternatively a single number treated as Duration or Number of Datapoints for all measurements (e.g. 5, behaviour is again controlled by duration_count).
trimmer A function to trim the intervall between start and end. See trim_time() for details.