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Mike & Herman,
Thanks.
Just out of interst, I have actually coded my problem now. Once using
only AFL in it's purest form (i.e. the IIF() route) and once using a
classic looping structure with [i] array referencing.
Out of interest, using the 'check' function in the foruma editor, the
pure AFL code is about twice as fast as a looping structure.
Thanks again.
--- In amibroker@xxxxxxxxxxxxxxx, "Mike" <sfclimbers@xxx> wrote:
>
> Herman gave a viable answer in his last post.
>
> I'd just like to add that I wouldn't let any bias against looping
> stand in the way of advancing an idea. So few ideas have any real
> promise that the sooner you can get something up and tested the
> better.
>
> You can always refine the code later. Even then, there is a lot to be
> said for code that reads well (to you) vs. code that performs well. If
> after a month's time you find yourself again struggling to decipher
> the code, then you might have been better off going with a more
> familiar construct.
>
> Mike
>
> --- In amibroker@xxxxxxxxxxxxxxx, "sidhartha70" <sidhartha70@>
> wrote:
> >
> > Mike & Herman,
> >
> > Thank you. Both good ideas... and sorry about moving the goal posts
> > here... but the problem is still becoming clear to me as I think
> about
> > it more... Actually, the problem I have with IIF() in these
> > circumstances is where I want to evaluate more than one expression
> > within the if() condition... for example,
> >
> > HLRange = abs( H - L );
> > ABC = HLRange > Ref( HLRange, -1 ) AND HLRange > Ref( HLRange, -2)
> AND
> > HLRange > Ref( HLRange, -3 );
> > XYZ_Check=IIf(Ref(ABC,-1),1,IIf(Ref(ABC,-2),2,IIf(Ref(ABC,-
> 3),3,0)));
> >
> > if(XYZ_Check==0)
> > {
> > RU1_Check = Open>Ref(Open,-1) AND Open>Ref(Open,-2) AND
> Open>Ref(Open,-3);
> > RU2_Check = Close>Ref(Close,-1) AND Close>Ref(Close,-2) AND
> > Close>Ref(Close,-3);
> > }
> > if(XYZ_Check==1)
> > {
> > RU1_Check = Open>Ref(Open,-2) AND Open>Ref(Open,-3) AND
> Open>Ref(Open,-4);
> > RU2_Check = Close>Ref(Close,-2) AND Close>Ref(Close,-3) AND
> > Close>Ref(Close,-4);
> > }
> > if(XYZ_Check==2)
> > {
> > RU1_Check = Open>Ref(Open,-3) AND Open>Ref(Open,-4) AND
> Open>Ref(Open,-5);
> > RU2_Check = Close>Ref(Close,-3) AND Close>Ref(Close,-4) AND
> > Close>Ref(Close,-5);
> > }
> > if(XYZ_Check==3)
> > {
> > RU1_Check = Open>Ref(Open,-4) AND Open>Ref(Open,-5) AND
> Open>Ref(Open,-6);
> > RU2_Check = Close>Ref(Close,-4) AND Close>Ref(Close,-5) AND
> > Close>Ref(Close,-6);
> > }
> >
> > Sorry if this is labouring a point. But I always get stuck by this
> > structure... I guess I should just use a loop, but I am loathe to if
> > there is another way.
> >
> > TIA
> >
> > --- In amibroker@xxxxxxxxxxxxxxx, "Mike" <sfclimbers@> wrote:
> > >
> > > Why not do it the same way you did XYZ_Check? Also, it would be
> more
> > > efficient to add variables rather than repeating the same
> operation.
> > >
> > > Open1 = Open > Ref(Open, -1);
> > > Open2 = Open > Ref(Open, -2);
> > > ...
> > > Open6 = Open > Ref(Open, -6);
> > >
> > > Open123 = Open1 AND Open2 AND Open3;
> > > Open234 = Open2 AND Open3 AND Open4;
> > > ...
> > > Open456 = Open4 AND Open5 AND Open6;
> > >
> > > RU1_Check = IIF(XYZ_Check == 0,
> > > Open123,
> > > IIF(XYZ_Check == 1,
> > > Open234,
> > > IIF(XYZ_Check == 2,
> > > ...
> > > );
> > >
> > > Mike
> > > --- In amibroker@xxxxxxxxxxxxxxx, "sidhartha70" <sidhartha70@>
> > > wrote:
> > > >
> > > > Herman,
> > > >
> > > > This is where the problem occurs... because what I actually want
> to
> > > do
> > > > within each conditional if() statement is carry out some more
> array
> > > > manipulations. For example,
> > > >
> > > > HLRange = abs( H - L );
> > > > ABC = HLRange > Ref( HLRange, -1 ) AND HLRange > Ref( HLRange, -
> 2)
> > > AND
> > > > HLRange > Ref( HLRange, -3 );
> > > > XYZ_Check=IIf(Ref(ABC,-1),1,IIf(Ref(ABC,-2),2,IIf(Ref(ABC,-
> > > 3),3,0)));
> > > >
> > > > if(XYZ_Check==0)
> > > > {
> > > > RU1_Check = Open>Ref(Open,-1) AND Open>Ref(Open,-2) AND
> > > Open>Ref(Open,-3);
> > > > }
> > > > if(XYZ_Check==1)
> > > > {
> > > > RU1_Check = Open>Ref(Open,-2) AND Open>Ref(Open,-3) AND
> > > Open>Ref(Open,-4);
> > > > }
> > > > if(XYZ_Check==2)
> > > > {
> > > > RU1_Check = Open>Ref(Open,-3) AND Open>Ref(Open,-4) AND
> > > Open>Ref(Open,-5);
> > > > }
> > > > if(XYZ_Check==3)
> > > > {
> > > > RU1_Check = Open>Ref(Open,-4) AND Open>Ref(Open,-5) AND
> > > Open>Ref(Open,-6);
> > > > }
> > > >
> > > > Any way to achieve this across the entire price array outside of
> a
> > > > loop....?
> > > >
> > > > TIA
> > > >
> > >
> >
>
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