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Filter peak table

Source: R/filter_peaks.R
filter_peaktable.Rd

Utility function to remove peaks from peak table, e.g., because their intensity is too low. Currently one can filter on mean, median, or maximum ("max") peak intensity or retention time.

Usage

filter_peaktable(
  peak_table,
  rts,
  min_rt,
  max_rt,
  min_value,
  lambda,
  what = c("median", "mean", "max"),
  tol = 0
)

Arguments

peak_table

A peak_table object from get_peaktable.

rts

Vector of retention times to include in the peak table.

min_rt

Minimum retention time to include in the peak table.

max_rt

Maximum retention time to include in the peak table.

min_value

Minimal cutoff for summarized peak intensity.

lambda

Component(s) to include in peak table (e.g. wavelengths if you are using HPLC-DAD/UV).

what

Whether to summarize intensities using mean, median, or max. Defaults to median.

tol

Tolerance for matching of retention times to rts.

Value

A peak table similar to the input, with all columns removed from the peak table that do not satisfy the specified criteria.

See also

get_peaktable, filter_peaks

Author

Ethan Bass

Examples

data(pk_tab)
pk_tab <- filter_peaktable(pk_tab, min_rt = 10, max_rt = 16)