subset_by_samples_and_xvalues: Subset by samples and x values

In specmine: Metabolomics and Spectral Data Analysis and Mining

Subset by samples and x values

Description

Selects samples and x values simultaneously.

Usage

subset_by_samples_and_xvalues(
  dataset,
  samples,
  variables = NULL,
  by.index = FALSE,
  variable.bounds = NULL,
  rebuild.factors = TRUE
)

Arguments

dataset	Dataset to subset.
samples	Sample indexes.
variables	Variables to keep.
by.index	Logical. If TRUE, variables are interpreted as indexes.
variable.bounds	Optional numeric bounds for x values.
rebuild.factors	If TRUE, rebuild factors in metadata.

Value

A dataset object with the same overall structure as the input, containing only the selected samples and selected x values. The returned object includes the corresponding subset of 'dataset$data' and matching rows of 'dataset$metadata'; factor levels are rebuilt when 'rebuild.factors = TRUE'.

Examples

data <- matrix(
  1:12,
  nrow = 4,
  dimnames = list(c("10", "20", "30", "40"), c("s1", "s2", "s3"))
)
metadata <- data.frame(
  class = factor(c("A", "B", "A")),
  row.names = c("s1", "s2", "s3")
)
dataset <- list(data = data, metadata = metadata)
subset_by_samples_and_xvalues(dataset, samples = c(1, 3), variables = c("10", "30"))

specmine documentation built on Aug. 5, 2026, 5:06 p.m.