calc_delta: Calculate concentration changes
In AgroCares/gasanalysr: Functions to process and analyse data from Gasera one

View source: R/fun_calc_delta_conc.R

calc_delta

R Documentation

Calculate concentration changes

Description

Calculates concentration changes between sealing and after incubation when a reference sample is given as start concentration.

Usage

calc_delta(dt, startconc = NA)

Arguments

`dt`	(data.table)
`startconc`	(character) character vector of sample_id's that act as pre- incubation start concentration for all samples

Value

out (data.table) A data.table with the following columns: sample_id,
gas,
sealtime,
mmtime (mean measurement time, the mean time of measurements of a sample),
incubation_time (time between sealing and mmtime expressed in days),
startconc (concentration or reference sample during measurement),
mmconc (mean concentration during measurement),
d_conc (difference in concentration between sample measurement and reference),
d_rate (rate of concentration change in concentration/day)