removeSample: Remove Samples from a Spectra or Spectra2D Object

In ChemoSpecUtils: Functions Supporting Packages ChemoSpec and ChemoSpec2D

Remove Samples from a Spectra or Spectra2D Object

Description

Removes specified samples from a Spectra or Spectra2D object.

Usage

removeSample(spectra, rem.sam)

Arguments

spectra	An object of S3 class ChemoSpec::Spectra() or ChemoSpec2D::Spectra2D().
rem.sam	Either an integer vector specifying the samples to be removed, or a character vector (handled as a regex) giving the sample names to be removed.

Details

This function will report if extra data elements are found. These will probably need to be edited manually. The indices reported to the console can be helpful in this regard.

If rem.sam is a character vector, the sample names are grepped for the corresponding values. Remember that the grepping process is greedy, i.e. grepping for "XY" find not only "XY" but also "XYZ".

Value

An object of S3 class ChemoSpec::Spectra() or ChemoSpec2D::Spectra2D().

Author(s)

Bryan A. Hanson (DePauw University).

Examples

if (checkForPackageWithVersion("ChemoSpec", 6.0)) {
  library("ChemoSpec")
  data(SrE.IR)

  # Remove the 9th spectrum/sample:
  SrE.IR$names
  SrE.IRa <- removeSample(SrE.IR, rem.sam = 9)
  SrE.IRa$names

  # Removes a spectrum/sample with this exact name:
  SrE.IRb <- removeSample(SrE.IR, rem.sam = "NW_adSrE")
  SrE.IRb$names
}

if (checkForPackageWithVersion("ChemoSpec2D", 0.5)) {
  library("ChemoSpec2D")
  data(MUD1)

  # Removes the 5th spectrum:
  MUD1$names
  MUD1a <- removeSample(MUD1, rem.sam = 5)
  MUD1a$names

  # Removes a spectrum/sample with this exact name:
  MUD1$names
  MUD1b <- removeSample(MUD1, rem.sam = "Ether_3")
  MUD1b$names
}

ChemoSpecUtils documentation built on May 29, 2024, 3:12 a.m.