Samples Objects in QueueMonitor

[Arrate Munoz Barrutia <arrate@desun1.epfl.ch>]

Hi everybody!

I have set a queuemonitor and I can access to the packets integrator

set qmon [$ns monitor-queue $n1 $n2 stdout]  
set int [$qmon get-pkts-integrator]

I do not understand why 

set samp [$qmon get-delay-samples]

give does not error but when I try to access the Samples object, ns
complains and says that $samp does not exit. 

I can  not do: 

$samp mean
$samp variance
$samp cnt

Is there something I have done badly?, When can I access to the mean,
variance and cnt of a samples object?.

Many thanks

Arrate