How can I take out months rows from each year.

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Megan Mirkhanian
Megan Mirkhanian 2020-2-9
编辑： Megan Mirkhanian 2020-2-10
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回答（2 个）

Hiro Yoshino
Hiro Yoshino 2020-2-10
d = ['190101'; '190201'; '190301']; % sample data
d_datetime = datetime(d, 'InputFormat', 'yyMMdd'); % change format to datetime
[y,m,d] = ymd(d_datetime); % break it into pieces
idx = m == 1 | m == 2; % extract the indices corresponding to Jan and Feb. You can add " | m == 12 " to extract December!
Please take a look at this. I belive this is applicable to your problem.
  2 个评论
Image Analyst
Image Analyst 2020-2-10
Then
yourTable = yourTable(~idx, :); % Extract all rows EXCEPT rows identified by idx.
Megan Mirkhanian
Megan Mirkhanian 2020-2-10
I am trying to get all the data to run in line 4 but it shoes an error

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Hiro Yoshino
Hiro Yoshino 2020-2-10
编辑：Hiro Yoshino 2020-2-10
I guess your date is not read as string.
tableData = readtable('yourExcel.xlsx');
tableData.Time = string(tableData.Time);
Then you can start from
d_datetime = datetime(tableData.Time, 'InputFormat', 'yyMMdd'); % change format to datetime
  2 个评论
Megan Mirkhanian
Megan Mirkhanian 2020-2-10
So I need the precipitation data for the month, so when I run it, it only shows month numbers, ex: it shows 1,1,1,1,1,1 then 2,2,2,2 and no info on precip. Sorry, if this all sounds confusing.
Hiro Yoshino
Hiro Yoshino 2020-2-10
[y,m,d] = ymd(d_datetime); % break it into pieces
idx = m == 1 | m == 2; % extract the indices corresponding to Jan
Do not forget these lines!! Good luck! almost there.

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