Read AMBER Coordinate files

Read coordinate data from an AMBER coordinate / restart file.

# S3 method for amber
read.crd(file, ...)

Arguments

file	name of crd file to read.
...	arguments passed to and from functions.

Details

Read a AMBER Coordinate format file.

Value

A list object of type ‘amber’ and ‘crd’ with the following components:

xyz

a numeric matrix of class ‘xyz’ containing the Cartesian coordinates.

velocities

a numeric vector containg the atom velocities.

time

numeric, length of the simulation (applies to Amber restart coordinate files).

natoms

total number of atoms in the coordinate file.

box

dimensions of the box.

References

Grant, B.J. et al. (2006) Bioinformatics 22, 2695--2696. http://ambermd.org/FileFormats.php

Author

Lars Skjaerven

Note

See AMBER documentation for Coordinate format description.

See also

read.prmtop, read.ncdf, as.pdb, atom.select, read.pdb, read.crd.charmm

Examples

if (FALSE) {
## Read Amber PRMTOP and CRD files
prm <- read.prmtop(system.file("examples/crambin.prmtop", package="bio3d"))
crd <- read.crd(system.file("examples/crambin.inpcrd", package="bio3d"))

## Convert to PDB format
pdb <- as.pdb(prm, crd)

## Atom selection
ca.inds <- atom.select(prm, "calpha")
}