## Introduction & Installation

metid is a R package which can be used for in-house (MS2) database construction, and metabolite identification based on in-house and public MS1/MS2 database.

Please install it via github.

if(!require(devtools)){
install.packages("devtools")
}
devtools::install_github("tidymass/metid")

All the demo data for metid are from demoData, so please install it first.

devtools::install_github("jaspershen/demoData")

metid is a part of tidymass, so you can also install it by installing tidymass.

## Database construction

Please refer to this article: Construct in-house MS2 datbase using metid for database construction.

## Public databases

We have provide some public databases and our in-house databases, so if you want to use them, please refer this article, Database provided for metid.

## Metabolite identification

If you want to identify metabolite without MS2 spectra, please refer to this article, Annotate metabolites according to MS1 database using metid.

If you want to identify metabolite with MS2 spectra, please refer to this article, Annotate metabolites according to MS2 database using metid.

If you want to identify a peak table with multiple databases, please refer to this article, Identify peak tables with multiple databases.

If you just want to identify single peak, please refer to this article: Identify single peak with metid.

## Other tools

metid package also has some useful tools, please refer to this article, Other tools in metid