docs: function(meanlog, sdlog) {
           return {
              d: function(x, logp) { return dlnorm(meanlog, sdlog, logp)(x); },
              p: function(q, lowerTail, logp) {
                 return plnorm(meanlog, sdlog, lowerTail, logp)(q);
              },
              q: function(p, lowerTail, logp) {
                 return qlnorm(meanlog, sdlog, lowerTail, logp)(p);
              },
              r: function() { return rlnorm(meanlog, sdlog)(); }
           };
        }