imbalSubdiv_A {treeDbalance} | R Documentation |
Calculation of the centroid angles
Description
imbalSubdiv_A
- Calculates the node imbalance value "centroid
angle" of a vertex which subdivides the edge (p,v)
at
v+x \cdot (p-v)
with x \in [0,1]
. For example,
we can obtain the node imbalance value of v
if x=0
, and
x=0.5
would indicate a subdividing node exactly in the middle of
v
and p
.
Attention: If x=1
, this function will not calculate the node imbalance
value of p
with respect to its incoming edge but with respect to the
edge (p,v)
itself. This enables us to estimate the
node imbalance integrals over the entire edge length.
imbalSubdiv_alpha
- Calculates the node imbalance value "minimal
centroid angle" of a vertex which subdivides the edge (p,v)
at
v+x \cdot (p-v)
with x \in [0,1]
. For example,
we can obtain the node imbalance value of v
if x=0
, and
x=0.5
would indicate a subdividing node exactly in the middle of
v
and p
.
Attention: If x=1
, this function will not calculate the node imbalance
value of p
with respect to its incoming edge but with respect to the
edge (p,v)
itself. This enables us to estimate the
node imbalance integrals over the entire edge length.
angle3dVec
- Calculates the angle in the interval [0,\pi]
between two 3D vectors a
and b
.
Note that the function returns 0 if one entry vector is (0,0,0)
.
Usage
imbalSubdiv_A(x, p, v, centr_v, centr_v_weight, edge_weight)
imbalSubdiv_alpha(x, p, v, centr_v, centr_v_weight, edge_weight)
angle3dVec(a, b)
Arguments
x |
Numeric value |
p |
Numeric vector of size 3 (3D coordinates of parent node |
v |
Numeric vector of size 3 (3D coordinates of node |
centr_v |
Numeric vector of size 3 (3D coordinates of the centroid of
the pending subtree of node |
centr_v_weight |
Numeric value >=0 (weight of the pending subtree of
node |
edge_weight |
Numeric value >=0 (weight of the edge |
a |
Numeric vector of size 3 (e.g., 3D coordinates). |
b |
Numeric vector of size 3 (e.g., 3D coordinates). |
Value
imbalSubdiv_A
Numeric value \in [0,\pi]
(higher values
indicate a higher degree of asymmetry).
imbalSubdiv_alpha
Numeric value \in [0,\pi/2]
(higher values indicate a higher degree of asymmetry).
angle3dVec
Numeric value in [0,\pi]
.
Author(s)
Sophie Kersting, Luise Kühn
Examples
imbalSubdiv_A(x=0.5,p=c(1,0,1),v=c(0,0,0),centr_v=c(0.5,0,0),
centr_v_weight=1,edge_weight=1)
imbalSubdiv_alpha(x=0.5,p=c(1,0,1),v=c(0,0,0),centr_v=c(0.5,0,0),
centr_v_weight=1,edge_weight=1)
angle3dVec(a=c(1,0,0),b=c(0,1,0)) # right angle = pi/2 = 1.5707...