Provided by: libisospec++-dev_2.1.3-1build1_amd64 
NAME
IsoSpec::Marginal - The marginal distribution class (a subisotopologue).
SYNOPSIS
#include <marginalTrek++.h>
Inherited by IsoSpec::LayeredMarginal, IsoSpec::MarginalTrek, and
IsoSpec::PrecalculatedMarginal.
Public Member Functions
Marginal (const double *_masses, const double *_probs, int _isotopeNo, int _atomCnt)
Class constructor.
Marginal & operator= (const Marginal &other)=delete
Marginal (const Marginal &other)
Copy constructor.
Marginal (Marginal &&other)
Move constructor.
virtual ~Marginal ()
Destructor.
int get_isotopeNo () const
Get the number of isotopes of the investigated element.
const double * get_lProbs () const
double getLightestConfMass () const
Get the mass of the lightest subisotopologue.
double getHeaviestConfMass () const
Get the mass of the heaviest subisotopologue.
double getMonoisotopicConfMass () const
Get the mass of the monoisotopic subisotopologue.
double getModeMass ()
The the mass of the mode subisotopologue.
double getModeLProb ()
Get the log-probability of the mode subisotopologue.
double fastGetModeLProb ()
Get the log-probability of the mode subisotopologue. Results undefined if
ensureModeConf() wasn't called before.
Conf computeModeConf () const
The the probability of the mode subisotopologue.
double getSmallestLProb () const
The the log-probability of the lightest subisotopologue.
double getAtomAverageMass () const
The average mass of a single atom.
double getTheoreticalAverageMass () const
The theoretical average mass of the molecule.
double variance () const
Calculate the variance of the theoretical distribution describing the subisotopologue.
double getLogSizeEstimate (double logEllipsoidRadius) const
Return estimated logarithm of size of the marginal at a given ellipsoid radius.
void ensureModeConf ()
Protected Member Functions
ISOSPEC_FORCE_INLINE double unnormalized_logProb (Conf conf) const
Calculate the log-probability of a given subisotopologue.
ISOSPEC_FORCE_INLINE double logProb (Conf conf) const
Protected Attributes
const unsigned int isotopeNo
const unsigned int atomCnt
const double *const atom_lProbs
const double *const atom_masses
const double loggamma_nominator
Conf mode_conf
double mode_lprob
Detailed Description
The marginal distribution class (a subisotopologue).
This class mostly provides some basic common API for subclasses, but itself is not
abstract. This class represents the probability distribution generated by one element only
-- a subisotopologue. For instance, it might be the distribution of C200, that might be
part of, say, C200H402. It corresponds to the multinomial distribution, where each
configuration can also be attributed a precise mass. The constructor method perform
initial hill-climbing to find the most probable sub-isotopologue (the mode).
Definition at line 42 of file marginalTrek++.h.
Constructor & Destructor Documentation
IsoSpec::Marginal::Marginal (const double * _masses, const double * _probs, int _isotopeNo,
int _atomCnt)
Class constructor.
Parameters
_masses A table of masses of the stable isotopes of the investigated element, e.g. for
C10 it is 2: C12 and C13.
_probs A table of natural frequencies of the stable isotopes of the investigated
element, see IUPAC at https://iupac.org/isotopesmatter/
_isotopeNo Number of isotopes of a given element.
_atomCnt The number of atoms of the given element, e.g. 10 for C10.
Returns
An instance of the Marginal class.
Definition at line 165 of file marginalTrek++.cpp.
Member Function Documentation
Conf IsoSpec::Marginal::computeModeConf () const
The the probability of the mode subisotopologue.
Returns
The probability of a/the most probable subisotopologue. Computes and returns the mode
configuration, a isotopeNo-large array that the caller is responsible for
delete[]-ing.
Definition at line 235 of file marginalTrek++.cpp.
int IsoSpec::Marginal::get_isotopeNo () const [inline]
Get the number of isotopes of the investigated element.
Returns
The integer number of isotopes of the investigated element.
Definition at line 88 of file marginalTrek++.h.
double IsoSpec::Marginal::getAtomAverageMass () const
The average mass of a single atom.
Returns
The average mass of a single atom.
Definition at line 281 of file marginalTrek++.cpp.
double IsoSpec::Marginal::getHeaviestConfMass () const
Get the mass of the heaviest subisotopologue. This is trivially obtained by considering
all atomNo atoms to be the heaviest isotope possible.
Returns
The mass of the heaviest subisotopologue.
Definition at line 259 of file marginalTrek++.cpp.
double IsoSpec::Marginal::getLightestConfMass () const
Get the mass of the lightest subisotopologue. This is trivially obtained by considering
all atomNo atoms to be the lightest isotope possible.
Returns
The mass of the lightiest subisotopologue.
Definition at line 250 of file marginalTrek++.cpp.
double IsoSpec::Marginal::getModeLProb () [inline]
Get the log-probability of the mode subisotopologue.
Returns
The log-probability of a/the most probable subisotopologue.
Definition at line 121 of file marginalTrek++.h.
double IsoSpec::Marginal::getModeMass () [inline]
The the mass of the mode subisotopologue.
Returns
The mass of one of the most probable subisotopologues.
Definition at line 115 of file marginalTrek++.h.
double IsoSpec::Marginal::getMonoisotopicConfMass () const
Get the mass of the monoisotopic subisotopologue. The monoisotopic subisotopologue is
defined as the molecule consiting only of the most likely isotope. This is frequently the
lightest subisotopologue, making this frequently (but not always) equal to
getLightestConfMass()
Definition at line 268 of file marginalTrek++.cpp.
double IsoSpec::Marginal::getSmallestLProb () const [inline]
The the log-probability of the lightest subisotopologue.
Returns
The logarithm of the smallest non-zero probability of a subisotopologue.
Definition at line 139 of file marginalTrek++.h.
double IsoSpec::Marginal::getTheoreticalAverageMass () const [inline]
The theoretical average mass of the molecule.
Returns
The theoretical average mass of the molecule.
Definition at line 151 of file marginalTrek++.h.
ISOSPEC_FORCE_INLINE double IsoSpec::Marginal::unnormalized_logProb (Conf conf) const
[inline], [protected]
Calculate the log-probability of a given subisotopologue.
Parameters
conf A subisotopologue (a table of integers describing subsequent isotope-counts).
Returns
The log-probability of the input subisotopologue.
Definition at line 159 of file marginalTrek++.h.
Member Data Documentation
const double* const IsoSpec::Marginal::atom_lProbs [protected]
Table of log-probabilities of all the isotopeNo isotopes.
Definition at line 49 of file marginalTrek++.h.
const double* const IsoSpec::Marginal::atom_masses [protected]
Table of atomic masses of all the isotopeNo isotopes.
Definition at line 50 of file marginalTrek++.h.
const unsigned int IsoSpec::Marginal::atomCnt [protected]
The number of atoms of the given element.
Definition at line 48 of file marginalTrek++.h.
const unsigned int IsoSpec::Marginal::isotopeNo [protected]
The number of isotopes of the given element.
Definition at line 47 of file marginalTrek++.h.
const double IsoSpec::Marginal::loggamma_nominator [protected]
The constant nominator that appears in the expressions for the multinomial probabilities.
Definition at line 51 of file marginalTrek++.h.
Conf IsoSpec::Marginal::mode_conf [protected]
A subisotopologue with most probability. If not unique, one of the representatives of that
class of subisotopologues.
Definition at line 52 of file marginalTrek++.h.
double IsoSpec::Marginal::mode_lprob [protected]
The log-probability of the mode subisotopologue.
Definition at line 53 of file marginalTrek++.h.
Author
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