searchlight_coords: Create an exhaustive searchlight iterator for voxel...

In bbuchsbaum/neuroim2: Data Structures and IO for Neuroimaging Data with an Emphasis on Functional Magnetic Resonance Imaging (FMRI)

Create an exhaustive searchlight iterator for voxel coordinates

Description

This function generates an exhaustive searchlight iterator that returns voxel coordinates for each searchlight sphere within the provided mask. The iterator visits every non-zero voxel in the mask as a potential center voxel.

Usage

searchlight_coords(mask, radius, nonzero = FALSE, cores = 0)

Arguments

mask	A NeuroVol object representing the brain mask.
radius	A numeric value specifying the radius (in mm) of the spherical searchlight.
nonzero	A logical value indicating whether to include only coordinates with nonzero values in the supplied mask. Default is FALSE.
cores	An integer specifying the number of cores to use for parallel computation. Default is 0, which uses a single core.

Value

A deferred_list object containing matrices of integer-valued voxel coordinates, each representing a searchlight region.

Examples

# Load an example brain mask
mask <- read_vol(system.file("extdata", "global_mask.nii", package="neuroim2"))

# Generate an exhaustive searchlight iterator with a radius of 6 mm
## Not run: 
searchlights <- searchlight_coords(mask, radius = 6)

## End(Not run)

bbuchsbaum/neuroim2 documentation built on Nov. 3, 2024, 9:31 a.m.