is.xyz. bio3d 2.3-0

Usage

is.xyz(x) as.xyz(x)

Checks whether its argument is an object of class ‘xyz’.

Tests if x is an object of class ‘xyz’, i.e. if x has a “class” attribute equal to xyz.

TRUE if x is an object of class ‘xyz’ and FALSE otherwise

# Read a PDB file
pdb <- read.pdb( system.file("examples/1hel.pdb", package="bio3d") )
is.xyz(pdb$xyz)

[1] TRUE