[amibroker] Re: How to implement: VarSelect( var1, var2, var3, ... , Varn, n);

["liberte721" <daniel.laliberte@xxxxxxxxx>]

You can use jscript to pass any number of arguments and select a 
value.  I provide two ways in the cold that follows.  The first way 
(selectVar) selects an AFL variable by its name and returns that.  I 
did this because I thought we could only pass simple numbers and 
strings to functions, but we can pass AFL arrays as well, so the 
second function, selectValue, selects the nth value and returns that.

Keep in mind that all your expressions will be evaluated, thus 
increasing the computation time.  It might be better to follow the 
suggestion to conditionally evaluate only the code you need.

EnableScript("jscript");
// Get script object to access the functions.
js = GetScriptObject();

<%
function selectVar( n )
// Return the value of the AFL variable named by the nth argument 
after n, origin 0.
{
	var args = arguments;
	var selectVarName = args[ n + 1 ];
	var value = AFL(selectVarName);
	return value;
}

function selectValue( n )
// Return the nth value after n.
// Values can be numbers or arrays.
{
	var value = arguments[ n + 1 ];
	return value;
}
%>

// Assign number or array to each variable
foo0 = 0; 
foo1 = barindex();
foo2 = Close;

myvar = js.selectVar(1, "foo0", "foo1", "foo2");
//Plot(myvar, "my var", colorBlack, styleOwnScale);

myval = js.selectValue(2, 0, barindex(), Close);
Plot(myval, "myval", colorRed, styleOwnScale);




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