is.select(x)
Checks whether its argument is an object of class select.
Tests if x is an object of class select, i.e. if x has a class attribute equal to select
.
# 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