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Create matrix based off date

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Devon Fisher-Chavez
关闭： MATLAB Answer Bot 2021-8-20
Hello,
I have a vector that I want to convert into a matrix based off date. I have one column (X) with date/time (yyyy-MM-dd HH:mm:ss) and a second column (Y) with my data. The data was taken every 30 min for 4 years. I want to create a matrix from my data (column Y) in which each row has data from one day. I have no clue where to begin, any help is greatly appreciated.
Thanks!

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回答（1 个）

Walter Roberson
Walter Roberson 2018-5-22
Convert to a timetable() object and use retime()
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Devon Fisher-Chavez
Devon Fisher-Chavez 2018-5-23
Thank you.
Our data is imperfect, however. There are a lot of missing points, filtered points, etc. so I would prefer a method that directly tests the time of day.
Devon Fisher-Chavez
Devon Fisher-Chavez 2018-5-23
actually, that works perfectly. the data is filled, plus I'd need filled data to make a matrix anyways... don't know what I was thinking. Thanks!

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