how to match the date ? and set a flag ?

I have created two mat files ! (attached)

I am finding nearest date and correspoding cell (from interpolated_radiosonde ) to mat_data_time dates.

1. TT_out gives what exactly what i want. but additionally i also want to create another vector that will tell me the which date (from interpolated_radiosonde) it has chosen as nearest date.
2. . The code below finds the nearest date but it doesn't tell how much nearest it is ! i want to add some syntax to this code which will create another timetable/mat file and give the list of dates which has gap more than 12 hours(or any number of hours I set).

any help will be appriciated. thank you.

load 'mat_data_time.mat'
load('interpolated_radiosonde.mat')
mat_data_time = datetime((mat_data_time(1,:))','ConvertFrom','datenum'); %selecting one time from the scan 
T = timetable(interpolated_radiosonde(:,2),'RowTimes',datetime(interpolated_radiosonde(:,1),'ConvertFrom','datenum'));
TT_out = retime(T,mat_data_time,'nearest');

[pruth]

first question solved.

just had to add

  T.Var2 = T.Time

before retime.

it gives me third vector in TT_out of matched data.

Answer 1

[pruth]

load('interpolated_radiosonde.mat')

mat_data_time = datetime((mat_data_time(1,:))','ConvertFrom','datenum'); %selecting one time from the scan 
T = timetable(interpolated_radiosonde(:,2),'RowTimes',datetime(interpolated_radiosonde(:,1),'ConvertFrom','datenum'));
T.Var2 = T.Time ;
TT_out = retime(T,mat_data_time,'nearest');

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%% to find flagg dates %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
thurshold_hour = hours(6) ; 
for i = 1:size(TT_out)    
if abs((TT_out.Time(i)-TT_out.Var2(i)))> thurshold_hour
    TD(i) = TT_out.Time(i).'; 
end 
end 
 TD = TD.';
flg_dates = ismissing(TD);
flagged_dates = TD(~flg_dates,:);
flagged_dates_difference = hours(TT_out.Time(:)-TT_out.Var2(:));