how to merge multiple timetable
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dear advisers,
i have multiple timetables with different timestamps (yyyy-mm-dd hh:mm), but within a same time period.
I wish to merge multiple timetables into a single timetable, and the measurement recorded for each corresponding timestamps shall be organized in ascending order (e.g. 2020-08-01 0:00 , 2008-08-01 1:00, ....).
Thank you for your advice.
采纳的回答
Cris LaPierre
2020-8-23
1 个投票
You might be able to use synchronize. If you have more than 2 tables, you will need to use it multiple times.
2 个评论
J. Alex Lee
2020-8-23
Just a quick note this would probably require conversion of your tables into timetables first with table2timetable().
Also based on quick read of the docs, doesn't appear to have an option to behave more like a join, i.e., do not fill missing? Anyway I suppose it ultimately depends on exactly what the end objective is.
Cris LaPierre
2020-8-23
The OP states they are using timetables.
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J. Alex Lee
2020-8-21
编辑：J. Alex Lee
2020-8-21
If the tables have the same columns, you should be able to simply vertically concatenate them and sort
t0 = sortrows(vertcat(t1,t2,t3))
4 个评论
Sehoon Chang
2020-8-21
J. Alex Lee
2020-8-21
i don't understand what measurement interval (diff(timestamp)?) has to do with number of columns in the table?
when you say "Table" are you referrring to the matlab "table" data type, or are you using it generically to mean "some 1D or 2D list of things"?
you can get better answers if you are more specific, e.g., post the actual data or some approximation of it.
Sehoon Chang
2020-8-22
yes, i meant the matlab 'table'.
What i meant by the measurement invertal (diff(timestamp)) is...
table_1 lists radiation value every 15 minutes and table_2 lists other measurements every hour.
Thanks alot for your help :)
J. Alex Lee
2020-8-22
look into "innerjoin" and "outerjoin"
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