inner.prod.Rd
Inner product of vectors (mass-weighted if requested).
inner.prod(x, y, mass=NULL)
x | a numeric vector or matrix. |
---|---|
y | a numeric vector or matrix. |
mass | a numeric vector containing the atomic masses for weighting. |
This function calculates the inner product between two vectors, or alternatively, the column-wise vector elements of matrices. If atomic masses are provided, the dot products will be mass-weighted.
See examples for more details.
Returns the inner product(s).
Grant, B.J. et al. (2006) Bioinformatics 22, 2695--2696.
Lars Skjaerven
nma
, normalize.vector
#> [1] 1 4 9inner.prod(y,z)#> [1] 1 10 27## Application to normal modes pdb <- read.pdb( system.file("examples/1hel.pdb", package="bio3d") ) ## Calculate (vibrational) normal modes modes <- nma(pdb)#> Building Hessian... Done in 0.011 seconds. #> Diagonalizing Hessian... Done in 0.074 seconds.## Check for orthogonality inner.prod(modes$U[,7], modes$U[,8])#> [1] -9.829387e-15