GRalgo-initGR: Growing Region initialization

Description Usage Arguments

Description

Initialize arguments of the Growing Region algorithm. For internal use.

Usage

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initGR(contrast, W, seed, sigma_max, range, range.seed, breaks, iter_max, sd.robust,
         keep.lower, keep.upper, history.sigma, history.step, history.front,
         rescale, verbose, method = "initGR")

Arguments

contrast

the contrast value of each observation. numeric vector.

W

the neighbourhood matrix. dgCMatrix.

seed

the index of the initial seeds or a binary indicator of the initial seeds. positive integer vector or logical vector.

sigma_max

the maximum admissible value for the variability of the group contrast. positive numeric.

range

the range of acceptable contrast values for the growing region group. numeric vector of size 2.

range.seed

the range of acceptable contrast values for the seeds. numeric vector of size 2.

breaks

the break points or the number of break points to use to categorize the contrast distribution. numeric vector or postive integer.

iter_max

the maximum number of iterations for the expansion of the growing region. postive integer.

sd.robust

should the median absolute deviation be used to estimte the variability of the group contrast, or the standard deviation ? logical.

keep.lower

should removing observations with high intensity of the region be forbidden ? logical.

keep.upper

should removing observations with low intensity of the region be forbidden ? logical.

history.sigma

should the values of sigma be recorded ? logical.

history.step

should the number of observations included in the growing region set be recorded ? logical.

history.front

should the propagation front of the GR set be recorded ? logical.

rescale

should the contrast be scaled ? logical.

verbose

should the execution of the function be traced ? logical.

method

the name of the function that called the initializer. character.


bozenne/MRIaggr documentation built on May 13, 2019, 1:39 a.m.