shell.levels: Compute the iso-levels of the shells.

In fsbrain: Managing and Visualizing Brain Surface Data

Compute the iso-levels of the shells.

Description

Compute the iso-levels of the shells.

Usage

shell.levels(
  volume,
  levels = NULL,
  num_levels = 5L,
  level_type = "quantile",
  level_range = c(0.2, 0.95)
)

Arguments

volume	a 3D numerical array.
levels	numerical vector or NULL, the levels given by the user.
num_levels	positive integer, the number of shells to compute if levels is NULL.
level_type	character string, 'quantile' or 'linear'.
level_range	numerical vector of length 2, the range from which the levels are taken.

Value

ascending numerical vector of levels, the outermost shell first.

fsbrain documentation built on Sept. 27, 2026, 1:07 a.m.