Is an Object of Class ‘xyz’?

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

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

Arguments

x	an R object to be tested

Details

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

Value

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

See also

read.pdb, read.ncdf, read.dcd, fit.xyz

Examples

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