Don't alias the builtin duration; that will create problems working with time objects.
You don't really want a duration, you just want sampled time.
dt=1000/44100; % sampling time, ms
N=(length(data); % number samples in record
T=(length(data)-1)*dt; % sample time, ms
t=linspace(0,T,N); % make the time vector match the size of the data stream
plot(t,data) % plot, axis will be in msec; adjust xlim, xtick as wanted
If you really, really wanted to use one of the fancier ML features, use a timeseries
