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Topic: datestr
Replies: 4   Last Post: Jun 12, 2009 4:05 AM

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Bizuayehu Mohammed

Posts: 18
Registered: 5/14/09
Re: datestr
Posted: Jun 12, 2009 4:05 AM
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"Michael " <mmorris@firstwind.com> wrote in message <h0oor2$pjk$1@fred.mathworks.com>...
> "Bizuayehu Mohammed" <bisaye@gmail.com> wrote in message <h0nk8i$739$1@fred.mathworks.com>...
> > "Jos " <#10584@fileexchange.com> wrote in message <h0lgmm$rqq$1@fred.mathworks.com>...
> > > "Bizuayehu Mohammed" <bisaye@gmail.com> wrote in message <h0lcla$8fq$1@fred.mathworks.com>...
> > > > Hi
> > > > I want to write a code that counts back 15 seconds in one second interval from current time,i.e from now.
> > > > I would appreciate any help

> > >
> > > help clock
> > > help while
> > > help etime
> > >
> > > % Example:
> > > t0 = clock ;
> > > while etime(clock,t0) < 1,
> > > end
> > > disp('Elapsed time:') ;
> > > disp(etime(clock,t0))
> > >
> > > hth
> > > Jos

> > Thanks but what I want is to plot a real time graph using this time that means I want the exact time value as HH:MM:SS in each interval for example 10:44:32 is the real time I want to have the values 10:44:31,10:44:30,10:44:29,10:44:28 ...etc till 15 seconds.
> > Many Thanks

>
> cellstr(datestr(datenum(now) - [1:15]/86400, 'mm/dd/yyyy HH:MM:SS'))
>
> That gives you the mm/dd/yyyy HH:MM:SS formatted times from the last 15 seconds. It's up to you to manipulate what I've done from there to turn it into something you can use to plot, as a cell array of strings is not a valid independent variable.

way way better than the code I wrote thanks a lot.



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