albatross (version 0.3-8)

[.feem: Extract or replace parts of FEEM objects

Description

Extract or replace parts of FEEM spectra. Returns FEEM objects unless dimensions should be dropped. When assigning from a FEEM object, requires wavelengths to match and warns if scale factors differ.

Usage

# S3 method for feem
[(x, i, j, drop = TRUE)
  # S3 method for feem
[(x, i, j) <- value

Value

For [: If drop is TRUE and at least one of the index arguments chooses only one element along its axis, a named numeric vector. Otherwise, a FEEM object.

For [<-: a FEEM object.

Arguments

x

A FEEM object.

i, j

Row and column indices, respectively. As in usual R subsetting (see Extract), may be integer, logical or character vectors, or missing.

drop

Coerce result to the lowest possible dimension (dropping the feem class if so).

value

An array-like object to assign values from. When assigning from FEEM objects, wavelengths are required to match and warnings are issued if scale factors don't match. Use vector subsetting (zero or one argument inside the brackets) to disable the check.

See Also

feem, [.feemcube

Examples

  (z <- feem(matrix(1:40, ncol = 8), 66 + 1:5, 99 + 1:8, 3))
  str(z[1:4, 1:2])
  str(z[1,, drop = TRUE])
  z[2:3, 4:5] <- feem(matrix(1:4, 2), 66 + 2:3, 99 + 4:5, 3)
  z