README.md
In audhalbritter/PFTCFunctions: Functions for PFTC Data

PFTCFunctions

PFTCFunctions is a collection of R functions used to collect plant functional traits during the Plant Functional Trait Course (PFTC). The trait data collection is organized in multiple stations where different traits are measured, and we call it the trait wheel (see figure below).

The different stages from collection, processing and curating data from the trait wheel.

The package contains the following: - download_PFTC_data - get_PFTC_envelope_code - make_barcode_labels

Install PFTCFunctions from GitHub using the following code:

# install.packages("remotes")
remotes::install_github("Plant-Functional-Trait-Course/PFTCFunctions")

to be added

The function get_PFTC_envelope_code creates unique hashcodes, which we use as unique IDs for each individual leaf. The codes are randomly created using a specific seed for each course (see table below) and contain 3 letters followed by 4 numbers.

| Country | seed | Campaign | as.3.5 | |:---------|-----:|:---------|:-------| | Peru | 1 | PFTC3 | TRUE | | Peru | 1 | Puna | TRUE | | Svalbard | 32 | PFTC4 | TRUE | | Peru | 6 | PFTC5 | TRUE | | Norway | 49 | PFTC6 | FALSE |

The as.3.5 decides if using R > 3.5 if to use the old or new sample method. Note that for PFTC6, as.3.5 needs to be FALSE.

This is how to use the function:

library(PFTCFunctions)
## create list with all envelope codes. And show the first five values
all_codes <- get_PFTC_envelope_codes(seed = 1)
all_codes$hashcode[1:5]
#> [1] "AAA4667" "AAB6541" "AAC0068" "AAD5960" "AAE3544"

The make_barcode_labels function creates a PDF with barcodes from the unique IDs with can then be printed on stickers.

In the trait wheel, each sampled leaf gets an ID and is put into an envelope for further processing. To avoid errors and simplify the process, we make barcodes from the unique IDs and produce stickers, which are put on the envelopes (see picture below).

We use the following label type: Avery or Herma 45.7 x 21.2 mm, 48 stickers per page For example see here.