Functions for Sholl analysis of neuronal skeletons
sholl_analysis(
x,
start = colMeans(xyzmatrix(x)),
starting.radius = radius.step,
ending.radius = 1000,
radius.step = ending.radius/100
)
# S3 method for neuron
sholl_analysis(
x,
start = colMeans(xyzmatrix(x)),
starting.radius = radius.step,
ending.radius = 1000,
radius.step = ending.radius/100
)
# S3 method for neuronlist
sholl_analysis(
x,
start = colMeans(xyzmatrix(x)),
starting.radius = radius.step,
ending.radius = 1000,
radius.step = ending.radius/100
)a neuron or neuronlist object
the origin from which spheres are grown for the Sholl analysis
the radius of the first sphere. Defaults to the radius step
the radius of the last sphere. If NULL the distance to the furthest dendritic point from the start point is taken
the change in radius between successive spheres. Defaults to one 100th of the radius of the ending sphere
a data.frame of spheres radii and the number of dendritic intersections at each radius
if (FALSE) {
# Calculate how much some neurons overlap with one another
## Example requires the package nat.flybrains
Cell07PNs_sholl = sholl_analysis(x = Cell07PNs, radius.step = 1, ending.radius = 100)
head(Cell07PNs_sholl[[1]])
}