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If you're just taking the difference between the two values, then you
don't need the -1 in each equation, as it will cancel out.
Regards,
GP
--- In amibroker@xxxxxxxxxxxxxxx, "Homar Simpson" <x77777x@xxx> wrote:
>
> Simple enough once you get past the myriad of possible options for
> getting dates. I did it this way
>
>
> mLastBarsdays= (LastValue(Year() )-1)*365 +LastValue(Day());
> mTodaysDays= (Now(8)-1) *365 + Now(10);
>
> I don't think it handles leap year but its sufficient for this purpose.
>
>
> --- In amibroker@xxxxxxxxxxxxxxx, "Paul Ho" <paultsho@> wrote:
> >
> > this is exceedingly simple. Check out Tomasz's knowledge base.
> > Now just to give you where you'll need to head towards
> > use the now() function to return the year and day of year of day
> > use lastvalue(year()) and Lastvalue(dayofyear() to calculate the
> last bar
> > take the difference, and check for leap year if they fall on different
> > years.
> > its all there is the knowledge base
> >
> >
> >
> >
> >
> > _____
> >
> > From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx]
> On Behalf
> > Of Homar Simpson
> > Sent: Thursday, 3 January 2008 3:47 PM
> > To: amibroker@xxxxxxxxxxxxxxx
> > Subject: [amibroker] Re: what is the simplest method of calculating
> the diff
> > between two dates in AFL
> >
> >
> >
> > I see why I didn't want to tackle this. Lot's of code there.
> >
> > All I really want to do is check to see if the last bar date is
> > older than X days from today. I'm filtering for stale dates, and ran
> > into a problem with the simple way I did this when the year rolled
over.
> >
> > Surely theres a less cumbersome way.
> >
> > --- In amibroker@xxxxxxxxx <mailto:amibroker%40yahoogroups.com>
ps.com,
> > "gp_sydney" <gp.investment@> wrote:
> > >
> > > If you mean number of calendar days between two dates, then it's
not a
> > > particularly simple problem (not that hard, but not trivial). There
> > > are issues with different numbers of days in a month and leap years.
> > >
> > > If you download the document "AmiBroker Custom Backtester
> > > Interface.pdf" from the files area here, there's some sample
code for
> > > this in Appendix A. Has nothing specifically to do with the CBI, but
> > > was part of an example used in that document.
> > >
> > > Regards,
> > > GP
> > >
> > >
> > > --- In amibroker@xxxxxxxxx <mailto:amibroker%40yahoogroups.com>
> ps.com,
> > "Homar Simpson" <x77777x@> wrote:
> > > >
> > > > seems quite obscure given the simplicity of the problem.
> > > >
> > > > Using datenum()
> > > >
> > >
> >
>
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