Function smoothly interpolates between two SPD matrices x and y.
The interpolation is parametrized by t, where t=0 returns x,
t=1 returns y, and t=.5 returns the mean of x and y
Usage
spd.interpolate(x, y, t, method = "euclidean", ...)
Arguments
- x, y
Symmetric, positive-definite matrices
- t
Interpolation parameter in [0,infinity)
- method
Type of interpolation (see details)
Details
Allowable distance measures are
"euclidean": Euclidean interpolation (1-t)x + ty
"logeuclidean": Euclidean interpolation in the tangent space.
"riemannian": Interpolation along the geodesic path from x to y
