matlab - How to display datetime() value up to milliseconds -

i have 2 questions:

1. in following matlab code x date time value of format "datetime(y,m,d,h,mi,s,ms)". display(x) command displays '00:00:00'. 'if condition' displays 'well received!' means real value of x greater 0 opposed '00:00:00' displayed display(x) command. please suggest how display full value of x milliseconds or microseconds.
2. how can save '0000,00,00,00,00,00,200' date time value?

send = datetime(2016,08,31,06,01,00,00); receive=datetime(2016,08,31,06,01,00,100); x=receive-send; display(x);    if (x>0)        disp('well received!')    else        disp('late!')    end 

the variable x created in example duration object. can specify display of milliseconds (as smaller decimal fractions of seconds) setting format property.

>> x.format = 'hh:mm:ss.sss'; >> display(x);     x = 00:00:00.100 

this presumably want when ask saving '0000,00,00,00,00,00,200' date time value. it's not date , time duration, , can created using duration constructor.

>> duration(00,00,00,200,'format','hh:mm:ss.sss')  ans =      00:00:00.200 

most operations acting on these duration objects work expected, such comparison > operator:

>> x > duration(00,00,00,200)  ans =       0