def _check_min(par, minval, name, unit, verb):
    r"""Check minimum value of parameter."""
    scalar = False
    if par.shape == ():
        scalar = True
        par = np.atleast_1d(par)
    if minval is not None:
        ipar = np.where(par < minval)
        par[ipar] = minval
        if verb > 0 and np.size(ipar) != 0:
            print('* WARNING :: ' + name + ' < ' + str(minval) + ' ' + unit +
                  ' are set to ' + str(minval) + ' ' + unit + '!')
    if scalar:
        return np.squeeze(par)
    else:
        return par
r"""Check minimum value of parameter.