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How can i sum +hours(6) in a date cell?

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Lucas Barboza
Lucas Barboza 2017-8-8
评论： Peter Perkins 2017-8-10
Good morning!
I am making a project and I create, because it is more easy in the global context of the project, a cell with a date array and a double array. And i want to sum 6 hours in a date array present in my cell, but i don't know how.
For instance:
<DateStrings = {'2014-05-26 08:00';'2014-08-03 20:00'}; t = datetime(DateStrings,'InputFormat','yyyy-MM-dd HH:mm')
num=[2;3];
Ex=cell(2, 2);
Ex(:,1)=num2cell(t(:)); Ex(:,2)=num2cell(num(:)); >
And i want to sum 6 hour in the dates presents in the cell Ex.
  1 个评论
Peter Perkins
Peter Perkins 2017-8-10
You say, "because it is more easy in the global context of the project, a cell with a date array and a double array", and that may be true, but you should seriously consider using a table, or even a timetable (if you have R2016b or later). Tables are designed for mixed data, and are much more convenient to use, and use less memory, than cell arrays.

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Jinsong Han
Jinsong Han 2017-8-8
On the datetime arithmetic documentation page for MATLAB R2017a, you can add 6 hours to a datetime object by using the hours method while specifying the amount of hours to add. Thus, to add 6 hours to all dates (assuming they are all in the first column of your cell array), you could do something like the following:
for x = 1:size(Ex, 1)
Ex{x, 1} = Ex{x, 1} + hours(6)
end
This loops through each value in the first column and adds 6 hours to the stored datetime object.

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