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Thanks, Barry. That is helpful to know. But I agree, will need to find
another way. I think TJ just gave me an idea.
--- In amibroker@xxxxxxxxxxxxxxx, "Barry Scarborough" <razzbarry@xxx>
wrote:
>
> It isn't impossible, just akward. I would try to find another way.
>
> StrToNum will convert the number up to the first non-number, the
> character + in your case. That is why you get 3 instead of 12.
> 3 + 4 + 5 is not a number and strToNum is not smart enough to add the
> numbers. When it gets to the + it quits and returns 3.
>
> To sum numbers in a string you have to parse the string to extract
> the numbers. This will extract the numbers from the string and sum
> them. The printf lines show what is being done along the way.
>
> VarSetText("Condition1", "3 + 4 + 5");
>
> aStr = VarGetText("Condition1");
> a = aStr;
> Offset = StrFind(aStr, "+") +1;
> Len = StrLen(aStr);
> b = StrMid(aStr, Offset, Len);
> Offset = StrFind(b, "+") +1;
> Len = StrLen(b);
> d = StrMid(b, Offset, Len);
>
> // this shows the output of the parser
> // at this point a, b and d are strings, not numbers.
> printf("a= " + a + ", b= " + b + ", d= " + d);
>
> // strToNum returns the number up to first text character
> x = StrToNum(a); // x = 3
> y = StrToNum(b); // y = 4
> z = StrToNum(d); // z = 5
>
> // now you can sum the numbers
> printf("\nTotal =" + NumToStr(x+y+z, 1));
>
> Of course if you have an alphanumeric string, such as "Sum 3 plus 4
> and then add 5.", the parsing it will get very difficult but it can
> be done.
>
> Barry
>
> --- In amibroker@xxxxxxxxxxxxxxx, "ozzyapeman" <zoopfree@> wrote:
> >
> > If it is just plain impossible to convert strings to actual values
> > (other than plain numbers), perhaps my DLL plugin needs to spit
> work in
> > a different way?
> >
> > This is the type of thing I am trying to achieve - to cycle through
> > thousands of conditions like:
> >
> > Condition1 = MA(C, 12) > C5 AND MA(C,20) < Close;
> > Condition2 = EMA(L,4) > C3 OR MA(H,7) > Close;
> > .
> > .
> > .
> > Condition2555 = MA(H, 50) < C12 AND EMA(L, 12) < Close;
> >
> >
> > Setting the left sides of the above expressions is easy, using
> dynamic
> > variables.
> >
> > But my DLL spits out the right sides of the above expressions, but
> only
> > as strings. So instead of the DLL returning strings, how else could
> it
> > interface with AmiBroker so that the dynamic assignments above are
> > created in the AFL?
> >
> >
> >
> >
> > --- In amibroker@xxxxxxxxxxxxxxx, "ozzyapeman" <zoopfree@> wrote:
> > >
> > > Or to take a more trivial example, the following prints "3"
> instead of
> > > "12":
> > >
> > > VarSetText("Condition1", "3 + 4 + 5");
> > >
> > > Total = StrToNum (VarGetText("Condition1"));
> > >
> > > printf ("Sum %g", Total);
> > >
> > > How do I convert the above string so that Total is equal to the
> > > expression itself, which is equal to 12?
> > >
> > >
> > > --- In amibroker@xxxxxxxxxxxxxxx, "ozzyapeman" zoopfree@ wrote:
> > > >
> > > > Yes, tried that. But since the values spit out by the function
> > aren't
> > > > just pure numbers, it does not seem to work.
> > > >
> > >
> >
>
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