Learn R Programming

⚠️There's a newer version (0.7.1) of this package.Take me there.

unfoldr (version 0.3)

Stereological Unfolding for Spheroidal Particles

Description

Stereological unfolding as implemented in this package consists in the estimation of the joint size-shape-orientation distribution of spheroidal shaped particles based on the same measured quantities of corresponding planar section profiles. A single trivariate discretized version of the (stereological) integral equation in the case of prolate and oblate spheroids is solved numerically by the EM algorithm. The estimation of diameter distribution of spheres from planar sections (Wicksell's corpuscle problem) is also implemented. Further, the package provides routines for the simulation of a Poisson germ-grain process with either spheroids or spheres as grains together with functions for planar sections.

Copy Link

Version

Install

install.packages('unfoldr')

Monthly Downloads

17

Version

0.3

License

GPL-2

Maintainer

Markus Baaske

Last Published

July 7th, 2015

Functions in unfoldr (0.3)

trivarHist

Trivariate histogram
verticalSection

Spheroid vertical section
getSpheroidSystem

Get spheroid system
binning3d

Histogram data
planarSection

Sphere planar section
unfold

Stereological unfolding
setupSpheroidSystem

Setup spheroid system
simSphereSystem

Simulation of sphere system
parameters3d

Original parameters
getAngle

Map angle
simSpheroidSystem

Simulation of spheroid system
em.saltykov

Expectation Maximization algorithm
getSphereSystem

Get sphere system
parameterEstimates

Estimated spatial histogram data
em.spheroids

Trivariate stereological unfolding
sectionProfiles

Constuctor section profiles
setupSphereSystem

Setup sphere system
binning1d

Binning numeric values
spheroids

A packed spheroids configuration
coefficientMatrixSpheres

Calculate coefficients (spheres)
coefficientMatrixSpheroids

Calculate coefficients (spheroids)
setbreaks

Break vectors