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

is.select(x)

Arguments

x

an R object to be tested.

Details

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

Value

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

Author

Julien Ide

See also

Examples

# Read a PDB file pdb <- read.pdb( system.file("examples/1hel.pdb", package="bio3d") ) # Print structure summary atom.select(pdb)
#> #> Call: atom.select.pdb(pdb = pdb) #> #> Atom Indices#: 1001 ($atom) #> XYZ Indices#: 3003 ($xyz) #> #> + attr: atom, xyz, call
# Select all C-alpha atoms with residues numbers between 43 and 54 ca.inds <- atom.select(pdb, "calpha", resno=43:54) is.select(ca.inds)
#> [1] TRUE