Compose two transforms (a->b and b->c)
Examples
# Compose two orthogonal transforms
R1 <- diag(3)
R2 <- diag(3)
T_ab <- new_align_transform("O", R1, from = 1, to = 2)
T_bc <- new_align_transform("O", R2, from = 2, to = 3)
T_ac <- compose_transform(T_ab, T_bc)