##
$d = $e->apply($c);
##
##
$e = t_linear({ rot => [45,45,45], dims => 3});
##
##
$PDL::Transform::debug = 1;
$e = t_linear({ rot => [45,45,45] });
# the above will emit:
# PDL::Transform::Linear: assuming 2-D transform (set dims option to change)