FAQs

How do I install R packages other than `SeroTrackR`?

The key package that you will need to be able to run the SeroTrackR R package and perform any other subsequent analyses is the tidyverse R packages.

install.packages("tidyverse")

Then once you have installed the tidyverse meta-package, then you load the library in as below:

library(tidyverse)

There are many dependencies that the SeroTrackR R package relies on. These packages help us to wrangle our data, process our MFI data into RAU, apply the machine learning classification algorithm, and create PDF reports.

If you are using R via RStudio, then when you load the SeroTrackR package it may prompt you to install all of these other files. Select yes if that is the case.

If it does not prompt you automatically, or if you are using another platform to use R, then use the code below:

setup <- function(){
  needed <- c(
    # Imports: Required 
    "dplyr", "drc", "forcats", "ggplot2", "here", "janitor", 
    "kableExtra", "knitr", "magrittr", "openxlsx", "parsnip", 
    "purrr", "ranger", "readr", "readxl", "rmarkdown", "stats", 
    "stringr", "tidyr", "tidyselect", "utils", "workflows", 
    # Imports: Suggested
    "glue", "htmltools", "httr", "jsonlite", "shiny.fluent", 
    "tidyverse", "zoo"
    )
  for(package in needed){
    if(!sum(installed.packages() %in% package)){
      install.packages(package)
    }
    
    require(package, character.only = TRUE)
  }
}

setup()

How do I organise my files?

It is best practice to create an R project (.Rproj) file and store all of your files in there. A comprehensive tutorial on how to create an R project can be found here.

You can then create a Quarto Markdown Document data_processing.qmd inside your R project where you can process all of your serological data.

my_R_project
└── data/
    ├── raw_data_plate1.csv
    ├── raw_data_plate2.csv
    ├── raw_data_plate3.csv
    ├── platelayout.xlsx
└── results/
└── data_processing.qmd

How can I read in my data?

Once you have an R project (.Rproj) setup, you can save all of your files into a new folder called “data”. Then you can read in your data as follows:

my_raw_data       <- "data/my_plate1.csv"
my_plate_layout   <- "data/my_plate_layout.xlsx"

Is there capability to run this without internet?

You will need internet to initially download the R package and to process certain files which call upon the internet.

The developers are currently working on how to leverage a safe no-internet option that allows for the incorporation of the classification algorithm. The reason we use the internet at the moment is because the files containing the algorithm are quite large.

I have multiple plate layout files. How can I input them?

Use the getPlateLayout() function to create a master plate layout file to then input into the other functions in the package!

getPlateLayout("your/folder/with/plate/layouts/")

Here replace “your/folder/with/plate/layouts/” with the main file that contains your folders. For example, if your folder looks like this:

my_R_project/
└── data/
    ├── plate_1/
    │   ├── raw_magpix_data_plate1.csv
    │   └── plate_layout_1.xlsx
    ├── plate_2/
    │   ├── raw_magpix_data_plate2.csv
    │   └── plate_layout_2.xlsx
    └── plate_3/
        ├── raw_magpix_data_plate3.csv
        └── plate_layout_3.xlsx

you would write:

getPlateLayout("data/")

you could ALSO write:

getPlateLayout()

OR:

getPlateLayout(folder_path = c("plate_layout_1.xlsx", "plate_layout_2.xlsx", "plate_layout_3.xlsx"))

I have multiple Luminex data types I’d like to analyse. How can I do this?

If you have, for example, both Bio-Plex and MAGPIX files and would like to analyse them both, then you can do some clever data manipulation as below:

*Note that in this example, there is one plate layout that contains all files in it. But the same idea can apply to readPlateLayout().

Input your Bio-Plex file/s:

Using a reproducible example:

library(SeroTrackR)
library(tidyverse)

bioplex_raw_plates <- c(
  system.file("extdata", "example_BioPlex_plate1.xlsx", package = "SeroTrackR"),
  system.file("extdata", "example_BioPlex_plate2.xlsx", package = "SeroTrackR")
)
all_plate_layout <- system.file("extdata", "example_platelayout_1.xlsx", package = "SeroTrackR")

For your data:

bioplex_raw_plates <- c(
  "data/example_BioPlex_plate1.xlsx", 
  "data/example_BioPlex_plate2.xlsx"
)
all_plate_layout <- "data/example_platelayout_1.xlsx"

Input your MAGPIX file/s:

Using a reproducible example:

magpix_raw_plate     <- system.file("extdata", "example_MAGPIX_plate3.csv", package = "SeroTrackR")

For your data:

magpix_raw_plate      <- "data/example_MAGPIX_plate3.csv"

Read the serological data files in:

# Serological data
bioplex_sero_data <- readSeroData(
  raw_data = bioplex_raw_plates,
  platform = "bioplex"
)
magpix_sero_data <- readSeroData(
  raw_data = magpix_raw_plate,
  platform = "magpix", 
  version = "4.2"
)

Merge the files together:

sero_data_merged <- NULL
# data_raw 
sero_data_merged$data_raw <- bioplex_sero_data$data_raw %>% 
  bind_rows(magpix_sero_data$data_raw)

# results 
sero_data_merged$results <- bioplex_sero_data$results %>% 
  bind_rows(magpix_sero_data$results)

# counts 
sero_data_merged$counts <- bioplex_sero_data$counts %>% 
  bind_rows(magpix_sero_data$counts)

# blanks
sero_data_merged$blanks <- bioplex_sero_data$blanks %>% 
  bind_rows(magpix_sero_data$blanks)

# stds
sero_data_merged$stds <- bioplex_sero_data$stds %>% 
  bind_rows(magpix_sero_data$stds)

# run 
sero_data_merged$run <- bioplex_sero_data$run %>% 
  bind_rows(magpix_sero_data$run)

Continue the rest of the pipeline: