Datenum with a.m. and p.m.
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I have a data set with timestamps:
'11/5/2019 12 a.m. EST'
...
'11/10/2019 1 p.m. EST'
How can I convert these timestamps into a vector of date numbers?
thanks for the help.
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Adam Danz
2019년 11월 15일
So you're converting from strings to datenum?
https://www.mathworks.com/help/matlab/ref/datenum.html
It might be necessary to remove the dots first using strrep but maybe not (my machine has been shut down for the night).
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Shubham Gupta
2019년 11월 15일
Assuming there is ".m. EST" attached to each "timestamp" at the end. You can follow the steps:
Step-1 Replace ".m. EST" to just "m" (Hint : regexprep)
Step-2 Convert the output into the date numbers (Hint: datenum)
You should get the output with date numbers in a array. (Not sure what do mean by "continuous"?)
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Walter Roberson
2019년 11월 15일
S = '11/5/2019 12 a.m. EST';
temp = regexprep(S, '\.m\.', 'm');
t = datetime(temp, 'Inputformat', 'd/M/yyyy h a z', 'TimeZone', 'America/Chicago');
The above will have "eastern time" as the attached timezone. You can switch it to EST but you will get a warning,
Warning: 'EST' specifies a time zone with a fixed offset from UTC, -05:00. This zone does not follow daylight saving time, and so may give unexpected results. See the datetime.TimeZone property for details about specifying time zones.
Adam Danz
2019년 11월 15일
Instead of the regexprep() you could also do
temp = strrep(S,'.','');
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