|
PureBytes Links
Trading Reference Links
|
Thanks Mike,
but my code is written in such a way that functions play the roles of
parameters(to avoid errors and facilitate debugging and changes),
trying to mimic polymorphism of OO language.
Problem is that i think functions cannot be changed at runtime during
backtesting , but have to be declared one and stay the same.
These functions return different prices (O/C) with different time
delays so I could rewrite the code and use one functions taking 2
paramters , one for delay and the other for O/P.
This what it comes to my mind now, but I would like to know why is tht
error produced.
what if I declare empty functions (like virtual declaration in c++) at
as an empty prototype at global scope and implement and give some
parameter dependent implementations later. Again is all about mimic
polymorphism.
Thanks
Ly
--- In amibroker@xxxxxxxxxxxxxxx, "Mike" <sfclimbers@xxx> wrote:
>
> Read http://www.amibroker.com/guide/a_userfunctions.html
>
> Then try changing your function signature to just take a parameter
> and move the declaration out of the if statement.
>
> e.g.
> function P1f(sys) {
> if (sys == 1) {
> ...
> }
> ...
> }
>
> Alternatively, you could create different functions for each scenario
> and check a condition in your calling code to determine which one to
> call.
>
> e.g.
> ...
> if (sys == 1) {
> P1f();
> } else {
> OtherP1f();
> }
> ...
> function P1f() {
> ...
> }
> function OtherP1f() {
> ...
> }
>
> I don't understand your scope question. But you may find the
> documentation for local/global helpful:
>
> http://www.amibroker.com/guide/keyword/local.html
> http://www.amibroker.com/guide/keyword/global.html
>
> Mike
>
> --- In amibroker@xxxxxxxxxxxxxxx, "loveyourenemynow"
> <loveyourenemynow@> wrote:
> >
> > I am trying to optimize over diffeent types of systems and I need to
> > define function accordingly, but I get and error with this code
> >
> > if (sys==1){
> > ///cc->co entry at close exit at day after open
> > SetOption("ActivateStopsImmediately",True);
> > SetTradeDelays(0,0,0,0);
> > ShortPrice=C;
> > BuyPrice=C;
> > CoverPrice=O;
> > SellPrice=O;
> > function P1f() {return Ref(C,-1);}
> > function P2f() {return Ref(C,0);}
> > ApplyStop(stopTypeNBar,stopModeBars,1,1);
> > dc=1;
> > MaxPosPer=1;
> > }
> >
> > while outside brackets it runs.
> >
> > In a similar way variable I noticed that arrays declared at
> different
> > scope levels are not accessible to the lower levels (i think scalr
> > yes) unless they are defined at gloabal level,
> > This is different from c++ scope conventions.
> > So the only way to share among different scopes (I mean portions of
> > code at differnt levels of {} nesting), seems to declare them
> globally.
> > Am I correct?
> >
> > Thanks
> > Ly
> >
>
Please note that this group is for discussion between users only.
To get support from AmiBroker please send an e-mail directly to
SUPPORT {at} amibroker.com
For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
http://www.amibroker.com/devlog/
For other support material please check also:
http://www.amibroker.com/support.html
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/amibroker/
<*> Your email settings:
Individual Email | Traditional
<*> To change settings online go to:
http://groups.yahoo.com/group/amibroker/join
(Yahoo! ID required)
<*> To change settings via email:
mailto:amibroker-digest@xxxxxxxxxxxxxxx
mailto:amibroker-fullfeatured@xxxxxxxxxxxxxxx
<*> To unsubscribe from this group, send an email to:
amibroker-unsubscribe@xxxxxxxxxxxxxxx
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
|