6CYANA: distances falsify - CYANA command

Parameters: selection=<string>             (default: <blank>)
            fraction=<real>                (default: 0.05)
            shiftdev=<real>                (default: 100000.0)
            resshift=<integer>             (default: 100000)

This command introduce a controlled amount of assignment errors
into a list of selected distance restraints. In a randomly selected
fraction of the selected distance restraints the first or second
atom assignment is changed to a randomly chosen hydrogen atom
or pseudoatom. Optionally, the choice of a new assignment can be
restricted to one with a chemical shift deviation from the original
assignment that is smaller than the value given to the parameter
'shiftdev'. Similarly, the choice of a new assignment can be restricted
to one with a residue number difference from the original assignment
that is smaller than the value given to the parameter 'resshift'.
