Import correct date and time from different columns in Excel

조회 수: 3 (최근 30일)
Daphne PARLIARI
Daphne PARLIARI 2020년 1월 14일
댓글: Star Strider 2020년 1월 16일
Hi guys!
I have several excel files I want to access in matlab and of course one of the problems is date and time.
I am attaching one .xlsx in order for you to understand: I must combine columns B,C and D to get the date and column E is time (0 means 00:00, 1 means 01:00 etc).
Therefore the first raw of my data express the date and time 1/5/2019 (May 1st, 2019) at 00:00.
If I try this
obsdata(:, 2) = round(obsdata(:, 2)) ;
obsdata(:, 3) = round(obsdata(:, 3)) ;
obsdata(:, 4) = round(obsdata(:, 4)) ;
obsdata(:, 5) = round(obsdata(:, 5)) ;
Date = datetime(obsdata(:, 2), obsdata (:, 3), obsdata(:,4), obsdata(:,5), 0 ,0)
it doesn't work. Date appears messed up...
Any ideas please?

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Star Strider
Star Strider 2020년 1월 14일
Try this:
In = readtable('Airport 2019 (1.5-30.9).xlsx', 'PreserveVariableNames',1);
hrmnsc = datetime(compose('%04d\n',In.Time), 'InputFormat','HHmm', 'Format','HH mm ss');
DVhms = datevec(hrmnsc);
DatesTimesDV = [table2array(In(:,2:4)), DVhms(:,4:6)];
DatesTimes = table(datetime(DatesTimesDV), 'VariableNames',{'DatesTimes'});
Airport = [In(:,1) DatesTimes In(:,6:end)];
The ‘Airport’ assignment is the desired result.
My apologies for the delay. It simply should not require a detour through date vectors to combine datetime dates and times.
  댓글 수: 4
Daphne PARLIARI
Daphne PARLIARI 2020년 1월 16일
I tried but failed... I downloaded R2019a and things are much more straightforward:
A.dec_time = datetime(A.year, A.month, A.day, A.Time, zeros(size(A,1),1), zeros(size(A,1),1));
Thank you for your help!
Star Strider
Star Strider 2020년 1월 16일
As always, my pleasure!
R2019a solved many problems. Upgrade to R2019b if you have the option toi do that. It solves more of them.

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