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Suggest you set up copy of your databse first and try various methods
first on that.
1. Import the data you ahve over the top and check what happens.
or
2. Export the existing data excluding the dates you have new data for,
then import that and the new into clean database
On 9/15/05, neurotic self <neuroticself@xxxxxxxxx> wrote:
> Oh, and btw, speaking of data "massage", I copied the code from the
> list some time ago to export quotes data to ascii
>
> Filter=1;
>
> // actual ohlc volume numbers from bars
> AddColumn( O, "O",1.4);
> AddColumn( H, "H",1.4);
> AddColumn( L, "L",1.4);
> AddColumn( C, "C",1.4);
> AddColumn( V, "V",1.4);
>
> I noticed that in the output midnight is 00:00:00 instead of 0.00.00
> (the format for the other quotes time), so I wrote an (ssed) script to
> batch-edit the wrong format, just wondering if this a minor bug in AB
> or the intended behavior. Thomasz?
>
>
> On 9/14/05, neurotic self <neuroticself@xxxxxxxxx> wrote:
> > Hallo,
> >
> > better ask the fellow users before I do some serious damage.
> >
> > I have a db set to 1-min frequency
> > latest year data ('05) is loaded as 1-min data
> > year before latest is loaded as 10-min data
> > year before is 1-hour data
> > and so on...
> >
> > This is because I thought I would have had difficulty
> > loading/backtesting more frequent data from the past, moreover I
> > didn't have that data at that time
> >
> > now: I found 1-min data for '04, and I also saw that performance is
> > not that much of a problem...
> >
> > 1. what happens if I just import again '04 in the db at 1-min level?
> > 2. will it overwrite previous 10-min data or will the system keep both?
> > 3.In the last case, is there a way to batch-delete quotations?
> >
> > Kthx,
> >
> > neuro
> >
> > --
> > Janeczko for President!
> >
>
>
> --
> Janeczko for President!
>
>
>
> Please note that this group is for discussion between users only.
>
> To get support from AmiBroker please send an e-mail directly to
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>
> For other support material please check also:
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>
>
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>
>
>
>
>
>
>
--
Cheers
Graham
AB-Write >< Professional AFL Writing Service
Yes, I write AFL code to your requirements
http://e-wire.net.au/~eb_kavan/ab_write.htm
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