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Extract metadata

Source: R/attach_metadata.R
extract_metadata.Rd

Extract metadata as a data.frame, data.table or tibble from a list of chromatograms.

Usage

extract_metadata(
  chrom_list,
  what = c("instrument", "detector", "detector_id", "software", "method", "batch",
    "operator", "run_datetime", "sample_position", "sample_name", "sample_id",
    "injection_volume", "time_range", "time_interval", "time_unit", "detector_range",
    "detector_y_unit", "detector_x_unit", "intensity_multiplier", "scaled",
    "source_file", "source_file_format", "source_sha1", "data_format", "parser",
    "format_out"),
  format_out = c("data.frame", "data.table", "tibble")
)

Arguments

chrom_list

A list of chromatograms with attached metadata (as returned by read_chroms with read_metadata = TRUE).

what

A character vector specifying the metadata elements to extract.

format_out

Format of object. Either data.frame, data.table or tibble.

Value

A data.frame, tibble, or data.table (according to the value of format_out), with samples as rows and the specified metadata elements as columns.