In tidymass/massconverter: Convert mass spectrometry raw data to othter format data

knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>",
  warning = FALSE,
  message = TRUE,
  out.width = "100%"
)

Pull `pwiz` docker

Please run docker first.

We need the docker image: https://hub.docker.com/r/chambm/pwiz-skyline-i-agree-to-the-vendor-licenses. So first we need use the docker_pull_pwiz() to pull this image.

library(massconverter)

docker_pull_pwiz()

If you want to pull the latest version, set force = TRUE

docker_pull_pwiz(force = TRUE)

Set the msconvert parameters

The we need to set parameters for converter.

 parameter =
   massconverter::create_msconvert_parameter(
     output_format = "mzXML",
     binary_encoding_precision = "32",
     zlib = TRUE,
     write_index = TRUE,
     peak_picking_algorithm = "cwt",
     vendor_mslevels = c(1, NA),
     cwt_mslevels = c(1, NA),
     cwt_min_snr = 0.1,
     cwt_min_peak_spacing = 0.1,
     subset_polarity = "positive",
     subset_scan_number = c(NA, NA),
     subset_scan_time = c(60, 300),
     subset_mslevels = c(1, 2),
     zero_samples_mode = "removeExtra",
     zero_samples_mslevels = c(1, NA),
     zero_samples_add_missing_flanking_zero_count = 5
   )

parameter

Convert data

Just put the raw data into one folder, and then begin to convert data.

Here we use the demo data, please download them here. And then put them in one folder named as demo_data/raw_data.

convert_raw_data(input_path = "demo_data/raw_data", 
                 output_path = "demo_data/mzxml", 
                 msconvert_parameter = parameter, 
                 docker_parameters = c(),
                 process_all = FALSE)

Then the converted data will be in the demo_data/mzxml

Bash code

If you want to run it in bash, you can also use the get_run_code() to get the code that can run in bash.

get_run_code(
  input_path = "demo_data/raw_data",
  output_path = "demo_data/mzxml",
  msconvert_parameter = parameter,
  docker_parameters = c(),
  process_all = FALSE
)