normalize_quantile_group: Normalize intensities across samples using grouped Quantile...

In metamorphr: Tidy and Streamlined Metabolomics Data Workflows

Normalize intensities across samples using grouped Quantile Normalization

Description

This function performs a Quantile Normalization on each sub-group in the data set. It therefore requires grouping information. See Examples for more information. This approach might perform better than the standard approach, normalize_quantile_all, if sub-groups are very different (e.g., when comparing cancer vs. normal tissue).

Other sub-flavors are also available:

• normalize_quantile_all

• normalize_quantile_batch

• normalize_quantile_smooth

See References for more information. Note that it is equivalent to the 'Class-specific' normalization in Zhao et al. but has been renamed for internal consistency.

Usage

normalize_quantile_group(data, group_column = .data$Group)

Arguments

data	A tidy tibble created by read_featuretable.
group_column	Which column should be used for grouping? Usually grouping_column = Group. Uses args_data_masking.

Value

A tibble with intensities normalized across samples.

References

Y. Zhao, L. Wong, W. W. B. Goh, Sci Rep 2020, 10, 15534, DOI 10.1038/s41598-020-72664-6.

Examples

toy_metaboscape %>%
  # Metadata, including grouping information, must be added before using normalize_quantile_group()
  join_metadata(toy_metaboscape_metadata) %>%
  normalize_quantile_group(group_column = Group)

metamorphr documentation built on June 10, 2026, 5:07 p.m.