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Appending data based on same dates

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Lee
Lee 2018-8-27
关闭： MATLAB Answer Bot 2021-8-20
I have two long tables. The first table (A) has two columns. The first indicates a date and the second indicates a value. A sample of the table is illustrated below:
A =
06-Jun-2015 00:00:00 1
07-Jun-2015 00:00:00 6
08-Jun-2010 00:00:00 1
08-Jun-2011 00:00:00 1
09-Jun-2010 00:00:00 52
09-Jun-2011 00:00:00 1
The second table contains a sample id and dates.
B =
"ahfeog" '08-Jun-2011 06:00:00'
"ahegao" '09-Jun-2010 21:00:00'
"agejho" '07-Jun-2015 03:00:00'
"ehagoa" '06-Jun-2015 06:00:00'
"eozjmv" '06-Jun-2015 18:00:00'
Ignoring the times, I want to be able to append the two tables together based on the date. My problem is that table B is significantly larger than table A and has repeat dates. Ideally my output would look like this:
Out =
"ahfeog" '08-Jun-2011 06:00:00' 1
"ahegao" '09-Jun-2010 21:00:00' 52
"agejho" '07-Jun-2015 03:00:00' 6
"ehagoa" '06-Jun-2015 06:00:00' 1
"eozjmv" '06-Jun-2015 18:00:00' 1
Could someone help me figure out how to do this?

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回答（2 个）

Paul Shoemaker
Paul Shoemaker 2018-8-27
Hello Lee,
You might want to convert these two tables to timetables and then combine them using various functions, such as "synchronize."
Matlab has some examples here.
Paul Shoemaker
http://www.matlabinvesting.com
  1 个评论
Lee
Lee 2018-8-27
Hello Paul Shoemaker,
Thank you for the response. Unfortunately, synchronize does not handle replicate dates and instead deletes one of the variables. The output I got was:
'08-Jun-2010 00:00:00' '<undefined>' 1
'09-Jun-2010 00:00:00' 'ahegao' 52
'08-Jun-2011 00:00:00' 'ahfeog' 1
'09-Jun-2011 00:00:00' '<undefined>' 1
'06-Jun-2015 00:00:00' 'ehagoa' 1
'07-Jun-2015 00:00:00' 'agejho' 6
Any other suggestions?
BasO
BasO 2018-11-12
Hi Lee,
Try to format the dates to 'dd-mmm-yyyy', this allows Matlab to syncronize as Paul said in his link.
Regards,

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