airm_unvec {riemtan} | R Documentation |
Compute the Inverse Vectorization (AIRM)
Description
Converts a vector back into a tangent matrix relative to a reference point using AIRM.
Usage
airm_unvec(sigma, w)
Arguments
sigma |
A symmetric positive-definite matrix of class |
w |
A numeric vector, representing the vectorized tangent image. |
Value
A symmetric matrix of class dspMatrix
, representing the tangent vector.
Examples
if (requireNamespace("Matrix", quietly = TRUE)) {
library(Matrix)
sigma <- diag(2) |>
Matrix::nearPD() |>
_$mat |>
Matrix::pack()
w <- c(1, sqrt(2), 2)
airm_unvec(sigma, w)
}
[Package riemtan version 0.1.0 Index]