Getting Keltner values

[werosen]

I am calling the Keltner EFS Library study with the following:

function preMain()
{
setPriceStudy(true);
setStudyTitle("Keltner");
setCursorLabelName("K");
}

function main()
{

var Keltner = call("Keltner.efs");

debugClear();
debugPrintln(" Keltner: " + Keltner);

}

When I load this study, the Keltner array with its three values is returned to the Formula Output Window as:

Keltner: 659.233333333332,658.6833333333333,658.12333333333 33

If I change the debugPrintln to display only the first value of the Keltner array as follows:

function preMain()
{
setPriceStudy(true);
setStudyTitle("Keltner");
setCursorLabelName("K");
}

function main()
{

var Keltner = call("Keltner.efs");

debugClear();
debugPrintln(" Keltner: " + Keltner[0]);

}

the Formula Output Window returns:

Type Error: Keltner has no properties

Can someone tell me how to return only the first value of the array?

I'm running this study in version 7.9 on a 150 tick chart for AB #F.

Thanks

[ACM]

werosen
Run a null check on the variable Keltner before retrieving an element of that array ie if(Keltner==null) return
Alex