text: require('../lib/rserve').connect('localhost', 6311, function(err, client) {
      var command = 'a<-2.7+2';
      console.log('evaluating', command);
      client.eval(command, function(err, ans) {
          console.log('answer', ans);
  
          var command = 'a';
          console.log('evaluating', command);
          client.eval(command, function(err, ans) {
              console.log('answer', ans);
              client.end();
          });
      });
  });
  