How is datevec used on an m*8 matrix in the form [YEAR, MONTH, DAY, HOUR, MINUTE, SECOND, Day of Year, Value]?

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Ryan Hickson 2017-4-3

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https://ww2.mathworks.cn/matlabcentral/answers/333417-how-is-datevec-used-on-an-m-8-matrix-in-the-form-year-month-day-hour-minute-second-day-of-yea

评论： Ryan Hickson 2017-4-13

I have an m*8 array with the form [YEAR, MONTH, DAY, HOUR, MINUTE, SECOND, Day of Year, Value], and I am unsure how to use datevec or another appropriate function to make the array easier to use, by graphing years, months and days etc. How can I do this?

1980 1 1 0 0 0 1 -27

1980 1 1 1 0 0 1 -20

1980 1 1 2 0 0 1 -23

1980 1 1 3 0 0 1 -28

1980 1 1 4 0 0 1 -32

1980 1 1 5 0 0 1 -32

1980 1 1 6 0 0 1 -32

1980 1 1 7 0 0 1 -31

1980 1 1 8 0 0 1 -33

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Answer 1

KSSV 2017-4-4

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https://ww2.mathworks.cn/matlabcentral/answers/333417-how-is-datevec-used-on-an-m-8-matrix-in-the-form-year-month-day-hour-minute-second-day-of-yea#answer_261632

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data = [1980  1  1  0  0  0  1  -27
1980  1  1  1  0  0  1  -20
1980  1  1  2  0  0  1  -23
1980  1  1  3  0  0  1  -28
1980  1  1  4  0  0  1  -32
1980  1  1  5  0  0  1  -32
1980  1  1  6  0  0  1  -32
1980  1  1  7  0  0  1  -31
1980  1  1  8  0  0  1  -33];
d = data(:,1:end-2) ;
val = data(:,end) ;
date = datetime(d) ;
plot(date,val)