Convert year into Matlab date format

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Aoyi
Aoyi 2018-5-5
编辑： dpb 2018-5-5
How can I convert the year into the matlab date format if I have a big data set? I have a table:
Year Data
1999
2000
2001 ...
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Aoyi
Aoyi 2018-5-5
I want to convert these years into a serial date number. But is it possible to use datedum if I only have the year? As it is an error if my date is only year but it is fine if I use year and month for the date
dpb
dpb 2018-5-5
编辑：dpb 2018-5-5
Yes, datenum(*) datevector input syntax requires the minimum 3-vector [y,m,d] so can't pass just a numeric year. As you've discovered, the easy workaround is to simply augment with the 1,1 for the month,day.
The same idea as Ameer shows below also works for datenum just for the record; I recommend using datetime for new work; it has many advantages over the venerable datenum.
>> yr=[1999:2002].';
>> yr=datenum(num2str(yr),'yyyy');
>> datestr(yr)
yr =
4×11 char array
'01-Jan-1999'
'01-Jan-2000'
'01-Jan-2001'
'01-Jan-2002'
>>
You note datenum has introduced the 1,1 mo,da value anyway so may as well use the simpler form and go on.
(*) BTW, datetime is the same; it won't supply implicit default values for missing arguments (another enhancement, maybe(???) altho how much trouble is it to add a ',1,1' to the argument list, anyway? :) )

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Ameer Hamza
Ameer Hamza 2018-5-5
If you have a numeric vector containing year numbers, you can convert a vector into a datetime array object as follow
myVector = 2000:2010
datetime(string(myVector), 'Format', 'yyyy')

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