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I don't understand this either. It certainly seems odd that
the first array element, the [0] element, is being always ignored.
--- In amibroker@xxxxxxxxxxxxxxx, "Don" <don.upton@xxxx> wrote:
> Hi All,
>
> I'm new to Amibroker, and although I've programmed in nearly all of
the
> major third-generation languages, I'm wrestling a little with
Amibroker
> scripts. Maybe I'm just getting too old. The simple code below
was meant
> to confirm my notion of what I could do with subscripts. As AFL
uses
> zero-based subscripting, I filled a little array x[0] thru x[9].
But to my
> dismay, I found STDEV() and MA() did not give me expected results at
> subscript [9]. If I extend the array to x[10] and do a 10-bar STDEV
() and
> MA() -- subscripts [1] thru [10] -- my results are as expected (in
subscript
> [10]). Is there something I don't understand about [0] subscript?
>
> Thanks for your help,
>
> ...Don
>
> // Explore - test stdev on small array; set "n last days" to 1,
select
> current stock
>
> Filter =1;
> x[0]=10; x[1]=10; x[2]=10; x[3]=10; x[4]=10; x[5]=10; x[6]=10; x[7]
=10;
> x[8]=10; x[9]=10; x[10]=10;
>
> SD10 = StDev(x,10);
> Avg10 = MA(x,10);
> AddColumn(x[0],"x",4.2);
> AddColumn(SD10[10],"SD[10]",4.4);
> AddColumn(Avg10[10],"Avg[10]",4.4);
> AddColumn(SD10[9],"SD[9]",4.4);
> AddColumn(Avg10[9],"Avg[9]",4.4);
>
> Results:
> x SD[10] Avg[10] SD[9] Avg[9]
> 10.00 0.0000 10.0000
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