Quality Control–based Robust LOESS Signal Correction
Batch shifting
Data filtering based on "qc" missing values
Filtering variable based on the percentage of missing values
Missing value percentage
Univariate outlier detection
QC based robust LOESS signal correction (QC-RLSC)
Wrapper function for QC-RLSC
qcrlscR: Quality Control–based Robust LOESS Signal Correction
An R implementation of quality control–based robust LOESS(local polynomial regression fitting) signal correction for metabolomics data analysis, described in Dunn, W., Broadhurst, D., Begley, P. et al. (2011) <doi:10.1038/nprot.2011.335>. The optimisation of LOESS's span parameter using generalized cross-validation (GCV) is provided as an option. In addition to signal correction, 'qcrlscR' includes some utility functions like batch shifting and data filtering.