How to create a new vector with AM/PM labels from vector of times

I have a single column vector with a bunch of times (in military time). The format of these is 12:00.

I need to create a new vector corresponding to this which is just a 1 if the time is PM (>12:00) or a 0 if the time is AM (<12:00).

I cannot seem to figure out a quick and simple way to do this.

Thank you.

Answer 1

[dpb]

Still learning way around the datetime object; may be more direct route...

   dtm=datetime(num2str([0:23].','%02d:00'),'inputformat','HH:mm','format','a');  % sample vector
   isPM=cellfun(@isempty,strfind(cellstr(dtm),'AM'));                             % check if AM/PM

ADDENDUM

More better--

isPM=(hour(dtm)>=12);

doesn't rely on the formatting nor need costly cell operations.

[Peter Perkins]

for AM PM, that'd be the way to go, more generally,

timeofday(dtm) > (hours(14) + minutes(30)) % after 2:30 pm, before midnight

[dpb]

Thanks, Peter, I still find doc dense here per our previous conversation...but I did see a mismatched closing parens above so fixing that is good. :)