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Ken,
A function only returns one variable - the one identified in the
return statement. If you want to return more than one variable, then
you need to identify them as "global" inside your function, otherwise
the defualt is "local".
Adding the following line after the "{" in the function should help.
global BuyDate1, BuyPrice1;
--- In amibroker@xxxxxxxxxxxxxxx, "Ken Close" <ken45140@xxx> wrote:
>
> I am trying to do some repetitive string manipulations, and keep
getting
> errors when trying to use a function.
>
> Can you help me out with this simplified code to exemplify what I
am trying
> to do.
>
> Lets say I have a series of strings like this:
>
>
> T1 = "DODFX 06/10/2007 50.78 ";
> T2 = "JORNX 07/13/2007 11.84";
>
> The contents are obvious, and I would like to set up some code
which cycles
> through these strings and extracts the relevant data.
>
> In Logic, Loop through each string, extract Sym, Date, Purchase
Price,
> calculate some stats, Print a line of results in an Explore grid.
>
> I tried code like this:
>
> function GetData(VarA)
> {
> Sym1 = StrMid(VarA,1,5);
> BuyDate1 = StrMid(VarA,7,10);
> BuyPrice1 = StrToNum(StrMid(VarA,19,5));
> P1 = Foreign(Sym1,"C");
> D1 = LastValue(P1) - BuyPrice1;
> Pct1 = 100 * (P1 - BuyPrice1)/BuyPrice1;
> return Sym1;
> }
>
> then this:
>
>
> function PrintLine(Sym1,BuyDate1,BuyPrice1,P1,D1)
> {
> AddTextColumn(Sym1,"Symbol",1.0);
> AddTextColumn(BuyDate1,"BuyDate",1.0);
> AddColumn(BuyPrice1,"BuyPrice",1.2);
> AddColumn(P1,"CurPrice",1.2);
> AddColumn(D1,"Gain",1.2);
> AddColumn(Pct1,"PcntGain",1.2);
> }
>
> for( i = 1; i < 3; i++ )
> {
> if (i == 1) XX = T1;
> if (i == 2) XX = T2;
> YY = GetData(XX);
> _TRACE(Sym1);
> PrintLine(Sym1,BuyDate1,BuyPrice1,P1,D1);
> }
>
> However, I can not get past the first step of recognizing the first
> variable, Sym1 (Error: Sym1 has not been initialized).
>
> I thought once I call the function, that the pass through the
function
> establishes the variables contained within the function. IOW, the
first
> call to GetData(VarA) establishes the Variable "Sym1". This does
not seem
> to be the case.
>
> So what might I do differently? At least to get the GetData
function to
> operate properly. I have several other questions but would
appreciate
> getting at least this far.
>
> Thanks for any help.
>
> Ken
>
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