ChemoSpecUtils (version 1.0.5)

removeSample: Remove Samples from a Spectra or Spectra2D Object

Description

Removes specified samples from a Spectra or Spectra2D object.

Usage

removeSample(spectra, rem.sam)

Value

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

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.

Author

Bryan A. Hanson (DePauw University).

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".

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
}