ploting time series without adding days

hello, I am writing a code that read data and plot it against time for 7 days. the problem is the daily count is not working

load phase.txt;
y1= phase(:,1);
ts1 = timeseries(y1,1:505);
ts1.TimeInfo.Units = 'minutes';
ts1.TimeInfo.StartDate='10-3-2014 13:19:44'; % Set start date.
ts1.TimeInfo.Format = 'yy/mm/dd HH:MM:SS';   % Set format for display on x-axis.
ts1.Time=ts1.Time-ts1.Time(1);        % Express time relative to the start date.
ts2 = setuniformtime(ts1,'Interval',20)
plot(ts2)