attribute( name => "ub_matrix", ...) (non-Tango)

attribute( name => "ub_matrix", get => ...);
Returns an attribute of the UB matrix.
$ret = attribute( name => "ub_matrix", get => "r0");
Returns hkl and the angles (tocp) of the first stored reflection.

$ret = attribute( name => "ub_matrix", get => "scan_mode");
$ret = attr( name => "ub_matrix", scan_mode => $val);
Returns/sets the scan mode. The meaning of $val is:

 0 - Bisecting
 1 - Fixed psi
 2 - Constant plane
 3 - Fixed phi
 4 - Fixed om2 (omega-two_theta*0.5)

$ret = attribute( name => "ub_matrix", get => "parameter");
$ret = attr( name => "ub_matrix", parameter => $val);
Returns/sets the scan mode parameter. The meaning depends on the scan mode, e.g.: for the fixed-psi mode it is the psi value.