   NA
#&gt; 59:     59    rexp deviation         100             NA           NA
#&gt; 60:     60    rexp deviation         100             NA           NA
#&gt;     job.id problem algorithm prob.pars.n prob.pars.mean prob.pars.sd
#&gt;     prob.pars.lambda algo.pars.method   result.res
#&gt;  1:               NA             mean -1.092018851
#&gt;  2:               NA           median -0.863780644
#&gt;  3:               NA             mean -1.084890423
#&gt;  4:               NA           median -1.505171