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Dans un courrier daté du 14/12/98 03:03:01 Heure d3iver Pari1 Madrid,
wieringa@xxxxxxxxxx a écrit :
> One thing that has been confusing me for some time is the history of a
> function and the function storage. Something I saw on the list a while
> back which gave me a hint, but I'm having trouble forming a question.
>
>
> Let me start by example. What exactly is happening in the following
> function call?
>
> x = MyFunc(a, b, c)[5];
>
> When I asked some questions to Omega a couple of months ago, I was led to
> believe that x would be set to the value that MyFunc generated 5 bars ago -
> and it was retrieved from storage (i.e. it wasn't re-executed). I may have
> worded my question poorly or may have misinterpretted their answer.
>
> If that is the case (x is what MyFunc(a, b, c) generated 5 price bars ago),
> are the values of a, b and c assumed then to have the values they had 5
> price bars ago?
>
Yes
> So what I am envisioning then, is TS executes all of the functions that are
> referenced by a system or indicator when it moves to a new bar. The inputs
> to these functions are the current values of the variables for that price
> bar. The function results are stored. Then the system/indicator code is
> executed and any reference to a function simply does a lookup (the inputs
> are disregarded in the case of a reference to a function N bars back).
> Then TS moves to the next bar, updates the function values again and then
> executes the code.
>
> Is this correct or close?
Yes again.
>
> If the function storage for MyFunc is set to simple instead of a series,
> what happens then?
>
Best thing to do is to use a print log command and see what happens in both
cases.
Sincerely,
Pierre Orphelin
www.sirtrade.com
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