licoread
In licoread: Reads Raw Files from Li-COR Gas Analyzers

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

Importing the data

library(licoread)
# this step is not needed if you know where your data are
path <- system.file("extdata/82z", package = "licoread")
# provide the location of your raw files to licoread
data <- licoread(path)

# if your location containes more than one file type, you will have to specify
# which files licoread should read
path <- system.file("extdata/mixed_files", package = "licoread")
gas_df_82z <- licoread(path, file_type = "82z")

Making a fluxible-friendly dataframe

path_81x <- system.file("extdata/81x", package = "licoread")
gas_df_81x <- licoread(path_81x)

co2_df <- licoread_to_fluxible(
  gas_df_81x,
  "CO2",
  datetime_col = "Date"
)

With the 82z file type, the name of measured gases is not so intuitive. You can use the list_gases() function to list all the gases present in the dataset.

list_gases(gas_df_82z)

ch4_dry <- licoread_to_fluxible(
  gas_df_82z,
  "LI-7810_CH4_DRY",
  datetime_col = c("LI-8250_DATE", "LI-8250_TIME")
)

Importing data from LI7500 tent setup

The function licoread::import7500 is tailored to import data files from the LI7500 tent setup described in @halbritterPlantTraitVegetation2024. The plotinfo argument imports information contained in the filename if there are separated by an underscore, for example [location]_[date]_[time of day]_[trial].txt. The function is recursive and will read all the files in the designated folder and its subfolders. It is therefore necessary that the designated folder contains only files to import that were all recorded with the same setup.

The default settings import files from before the update of the LI7500.

# this step is not needed if you know where your data are
path_co2fluxtent <- system.file("extdata/co2fluxtent", package = "licoread")
data <- import7500(
  path_co2fluxtent,
  plotinfo = c("date", "location", "time_of_day", "trial")
)

To read files created after the update of the LI7500, set version = "post2023".

# this step is not needed if you know where your data are
path_pftc7 <- system.file("extdata/pftc7", package = "licoread")
data <- import7500(path_pftc7, version = "post2023")

In case a comment was written while creating the files (typically inserted on the line above the column names), it is automatically added in the column comment.

# this step is not needed if you know where your data are
path_pftc5 <- system.file("extdata/pftc5", package = "licoread")
data <- import7500(
  path_pftc5,
  plotinfo = c("site", "block", "date", "plot", "trial")
)