Mass-weighted Inner Product
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).
Lars Skjaerven
Grant, B.J. et al. (2006) Bioinformatics 22, 2695–2696.
## Matrix operations
x <- 1:3
y <- diag(x)
z <- matrix(1:9, ncol = 3, nrow = 3)
inner.prod(x,y)
inner.prod(y,z)
## Application to normal modes
pdb <- read.pdb( system.file("examples/1hel.pdb", package="bio3d") )
## Calculate (vibrational) normal modes
modes <- nma(pdb)
## Check for orthogonality
inner.prod(modes$U[,7], modes$U[,8])Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.