mpactr is a collection of filters for the purpose of identifying high quality MS1 features by correcting peak selection errors introduced during the pre-processing of tandem mass spectrometry data.

Filters in this package address the following issues:

• filter_mispicked_ions(): removal of mispicked peaks, or those isotopic patterns that are incorrectly split during preprocessing.
• filter_group(): removal of features overrepresented in a specific group of samples; for example removal of features present in solvent blanks due to carryover between samples.
• filter_cv(): removal of non-reproducible features, or those that are inconsistent between technical replicates.
• filter_insource_ions(): removal of fragment ions created during the first ionization in the tandem MS/MS workflow.

All filters are independent, meaning they can be used to create a project-specific workflow, or you can learn more in the Getting Started page.

You can install the CRAN version with:

install.packages("mpactr")

You can install the development version of mpactr from GitHub with:

# install.packages("devtools")
devtools::install_github("mums2/mpactr")

See the Getting Started page to get started.

If you encounter an issue, please file an issue on GitHub. Please include a minimal reproducible example with your issue.

Is there a feature you’d like to see included, please let us know! Pull requests are welcome on GitHub.