fsbrain (version 0.5.3)

surf.avg.vertexradius: Compute average distance from the origin to each vertex.

Description

Compute average distance from the origin to each vertex.

Usage

surf.avg.vertexradius(surface, with_stddev = FALSE)

Value

scalar double, the average distance.

Arguments

surface

an fs.surface instance, and for the typical use case of this function, a spherical surface.

with_stddev

logical, whether to compute the standard deviation as well and return a named list with the 'avg' and the 'stddev' instead.

Examples

if (FALSE) {
spherical_surface = subject.surface(fsaverage.path(), "fsaverage3",
  surface="sphere", hemi="lh");
vr = fsbrain:::surf.avg.vertexradius(spherical_surface);
# Show histogram to verify that the surface is a sphere centered at 0,0,0:
hist(freesurferformats::vertexdists.to.point(spherical_surface, c(0,0,0)));
# Plot the coords and a point at the origin:
fsbrain::highlight.points.spheres(rbind(spherical_surface$vertices, c(0,0,0)));
}