root-cp command

root-cp selects and copies keys from a ROOT file to another ROOT file.

Usage: root-cp [options] file1.root[:REGEXP] [file2.root[:REGEXP] [...]] out.root

ex:

$> root-cp f.root out.root
$> root-cp f1.root f2.root f3.root out.root
$> root-cp f1.root:hist.* f2.root:h2 out.root