setbreaks: Break vectors

In unfoldr: Stereological Unfolding for Spheroidal Particles

Description

Construct class limits vectors

Usage

setbreaks(nclass, maxSize, base = NULL, kap = 1, sizeType = c("linear", "exp"))

Arguments

nclass	number of classes
maxSize	maximum of size values
base	constant for size class construction
kap	constant for shape class construction
sizeType	either linear or exp, default is linear

Details

The function constructs the class limits for the size, shape and orientation parameters. One can either define "linear" class limits of the sizes as a_i=iδ, δ=maxSize/M or using exponentially increasing limits like base^i, i=1,…,M. The orientation classes are defined by θ_j=jω, ω=π/(2N), j=1,…,N in the range [0,π/2], where M,N are the number of size classes and, respectively, the number of orientation classes. The argument base must not be NULL if sizeType equals "exp".

Value

list of class limits vectors

Author(s)

M. Baaske

Examples

  setbreaks(c(8,5,7),0.935,base=0.5,kap=1.25,sizeType="exp")
  

Example output

$size
[1] 0.00390625 0.00781250 0.01562500 0.03125000 0.06250000 0.12500000 0.25000000
[8] 0.50000000

$angle
[1] 0.0000000 0.3141593 0.6283185 0.9424778 1.2566371 1.5707963

$shape
[1] 0.00000000 0.08782688 0.20888870 0.34676002 0.49682385 0.65665908 0.82473896
[8] 1.00000000

unfoldr documentation built on Sept. 25, 2021, 1:07 a.m.