subset2mspct: Convert 'long' or tidy spectral data into a collection of...

In photobiology: Photobiological Calculations

Convert 'long' or tidy spectral data into a collection of spectra

Description

Convert a data frame object or spectral object into a collection of spectra object of the matching class. For data frames converting numeric columns other than wavelength into individual spct objects. For collection of spectra objects, subset/expand long-form members into multiple members of the same collection.

Usage

subset2mspct(
  x,
  member.class = NULL,
  idx.var = attr(x, "idfactor"),
  drop.idx = TRUE,
  ncol = 1,
  byrow = FALSE,
  ...
)

Arguments

x	a generic_spct object or of a derived class, or a data frame, or a generic_mspct object or of a derived class.
member.class	character string.
idx.var	character Name of column containing data to be copied unchanged to each spct object.
drop.idx	logical Flag indicating whether to drop or keep idx.var in the collection members.
ncol	integer Number of 'virtual' columns in data.
byrow	logical If ncol > 1 how to read in the data.
...	additional named arguments passed to the member constructor function.

Value

A collection of spectral objects, each with attributes set if x is a spectral object in long form with metadata attributes. If this object was created by row binding with 'photobiology' 0.9.14 or later then all metadata for each individual spectrum will be preserved, except for comments which are merged.

Note

A non-null value for member.class is mandatory only when x is a data frame.

See Also

Other Coercion methods for collections of spectra: as.calibration_mspct(), as.chroma_mspct(), as.cps_mspct(), as.filter_mspct(), as.generic_mspct(), as.object_mspct(), as.raw_mspct(), as.reflector_mspct(), as.response_mspct(), as.solute_mspct(), as.source_mspct(), split2mspct()

photobiology documentation built on Oct. 21, 2023, 1:06 a.m.