spec is the class for spectral models;
an object
of class "mass" is initialized if
mod_type = "spec" is an
argument of initModel.
All objects of class
spec are
also of class dat; see documentation for dat
for a description of
these slots. Note that here x2
will refer to the independent variable in
which traces are resolved, e.g., wavelength or wavenumber.
Objects can be created by calls of the form new("spec", ...) or
spec(...).
clpequ:Object of class "vector" of starting values for linear relationships between
clp
specpar:Object of class "list" of vectors of
starting values for spectral parameters; the number of vectors gives the
number of components in the resulting spectral model;
each vector contains the parameters
associated with a component. e.g.,
specpar = list(c(20000, 3000, .3, 21000, 2000, .4), c(18000, 1000, .2));
the parameters in each vector are grouped
c(location_spectra, width_spectra, skew_spectra).
the location and width parameters are given in wavenumbers.
specfun:Object of class "character", "gaus" for a spectral model of a
superposition of skewed Gaussians; "bspline" for a
bspline-based model.
specref:Object of class "numeric" index defining the center value of the
x2 variable.
specCon:Object of class "list" used internally to
store constraints.
specdisp:Object of class "logical" TRUE if time-dependence of the spectral parameters
is to be taken into account and FALSE otherwise
specdisppar:Object of class "list"
specdispindex:Object of class "list" of vectors defining those indexes of specpar whose
time-dependence is to be modeled. e.g., specdispindex = list(c(1,1),
c(1,2), c(1,3)) says that parameters 1-3 of spectra 1 are to be modeled as
time-dependent.
nupow:Object of class "numeric" describing the power to which wavenumbers are raised in
the model equation; see Equation 30 of the paper in the references section
for a complete description
timedep:Object of class "logical" describing whether the model for spectra E is dependent
on x-index (i.e., whether it is clp-dependent).
parmufunc:Object of class "character" describing the function form of the
time-dependence of spectral parameters; options are "exp"
for exponential time
dependence, "multiexp" for multiexponential time dependence, and
"poly" for
polynomial time dependence. defaults to polynomial time dependence.
vector describing the number of columns of the E matrix for
each value in the x vector
Class dat-class, directly.
Katharine M. Mullen, Ivo H. M. van Stokkum
Ivo H. M. van Stokkum, "Global and target analysis of time-resolved spectra, Lecture notes for the Troisieme Cycle de la Physique en Suisse Romande", Department of Physics and Astronomy, Faculty of Sciences, Vrije Universiteit, Amsterdam, The Netherlands, 2005, https://www.nat.vu.nl/~ivo/pub/2005/lecturenotes3cycle.pdf
kin-class,
dat-class