Metabolites with NA in annotation columns are all annotated as S-(methyl)glutathione

[henrygong]

Hi, I'm running the package (version 0.9.5 per sessionInfo) and all of the unknown metabolites I have, with NAs in the annotation columns, have been annotated as SMP00015 S-(methyl)glutathione.

Steps:

1. import data
2. create met object
3. get_SMPDBanno
4. knn_impute
5. normalize_met
6. check with rowData(met[["norm_imputed"]])

Please let me know if you need me to run any dummy data or something along those lines.