Series & getValue

[cls]

Greetings,

I'd like build one function that recieves one parameter like "SourcePrice" (i.e hl2, hlc3, ...), and returns one array with the complete serie, for educational purposes.
The code that I have developed doesn't work. Only returns one value.

Could you help me, please ? Thanks very much.

/************************************************************************
* Ejemplos para elegir el tipo de precio                                 
* Los precios posibles son: close open high low hl2 hlc3 ohlc4           
*************************************************************************/
function preMain() {

    setPriceStudy(false);
    setStudyTitle("PriceSource");
    
    var Param1 = new FunctionParameter("sSource",
                          FunctionParameter.STRING);
    Param1.setDefault("hl2");
}

function main(sSource){
    
    if ( sSource == null ) sSource = "hl2";
    //I like get one array with ten previous values
    var a = eval( sSource+"().getValue(0,-10)");
    if ( a == null ) return null;

    return new Array( a[0], a[1]); // <<< DON'T WORK !!!


    //var b = getSeries(a); //  <<< That doesn´t work neither
} 

[eSignal_JasonK]

Hello Cls,

With EFS2 Series Objects, the .getValue() method does not take a number of bars parameter as it is not necessary. Since the EFS2 Series is already an array that contains all the data you just use the .getValue() method to retrieve the specific element of this series (or array) by bar index reference. Try the modified code below. The key is to create a global variable to store the series (see xSeries).

function preMain() {

    setPriceStudy(false);
    setStudyTitle("PriceSource");
    
    var Param1 = new FunctionParameter("sSource", FunctionParameter.STRING);
    Param1.setDefault("hl2");
}

var xSeries = null;  //add

function main(sSource) {
    
    if ( sSource == null ) sSource = "hl2";

    if (xSeries == null) xSeries = eval( sSource+"()");
    
    var a0 = xSeries.getValue(0);
    var a1 = xSeries.getValue(-1);
    if ( a1 == null ) return;

    return new Array( a0, a1);
} 

[cls]

JasonK, thanks very much. Your answer have been very useful.
I were confused with "getValue function" and "getValue method".

Greetings

[eSignal_JasonK]

You're most welcome.