Why doesn't this work?

[tcstringham]

I've read through this post, and but i can't get the getValue function to work in the code posted below. It tells me the call function is undefined. Any ideas?

debugClear();
function preMain() {
setPriceStudy(true);
setStudyTitle("Daily Drummond");
setCursorLabelName("D",0);
setCursorLabelName("D",1);
setCursorLabelName("D",2);
setCursorLabelName("D",3);
setDefaultBarFgColor(Color.RGB(0xFF,0xFF,0x00),0);
setDefaultBarFgColor(Color.RGB(0xFF,0xFF,0x00),1);
setDefaultBarFgColor(Color.RGB(0xFF,0xFF,0x00),2);
setDefaultBarFgColor(Color.RGB(0xFF,0xFF,0x00),3);
setPlotType(PLOTTYPE_FLATLINES,0);
setPlotType(PLOTTYPE_FLATLINES,1);
setPlotType(PLOTTYPE_FLATLINES,2);
setPlotType(PLOTTYPE_FLATLINES,3);
setDefaultBarThickness(2,0);
setDefaultBarThickness(2,1);
setDefaultBarThickness(2,2);
setDefaultBarThickness(2,3);
}

var prevH = null;
var prevL = null;
var prev2H = null;
var prev2L = null;
var H2H = null;
var H2L = null;
var L2H = null;
var L2L = null;
var bInit = false;
var xHigh = null;
var xLow = null;

function main() {
if(bInit == false){
xHigh = high(inv("D"));
xLow = low(inv("D"));
bInit = true;
}

var prevH = xHigh.getValue(-1);
var prevL = xLow.getValue(-1);
var prev2H = xHigh.getValue(-2);
var prev2L = xLow.getValue(-2);
if(prev2H == null)
if(prev2L == null)
if(prevH == null)
if(prevL == null)
return;

H2H = (prevH - prev2H) + prevH;
H2L = (prevL - prev2H) + prevL;
L2H = (prevH - prev2L) + prevH;
L2L = (prevL - prev2L) + prevL;
return;

return new Array(H2H.getValue(0),H2L.getValue(0),L2H.getValue (0),L2L.getValue(0));
}

I've tried different variations on this theme, including trying to define another set of variables and then calling the function (i.e., newvar = H2H.getValue(0);...
return new Array(newvar...);
Same result.

Any help woul dbe appreciated.

[waynecd]

Try this ( I commented the corrections):

Wayne

debugClear();
function preMain() {
setPriceStudy(true);
setStudyTitle("Daily Drummond");
setCursorLabelName("D",0);
setCursorLabelName("D",1);
setCursorLabelName("D",2);
setCursorLabelName("D",3);
setDefaultBarFgColor(Color.RGB(0xFF,0xFF,0x00),0);
setDefaultBarFgColor(Color.RGB(0xFF,0xFF,0x00),1);
setDefaultBarFgColor(Color.RGB(0xFF,0xFF,0x00),2);
setDefaultBarFgColor(Color.RGB(0xFF,0xFF,0x00),3);
setPlotType(PLOTTYPE_FLATLINES,0);
setPlotType(PLOTTYPE_FLATLINES,1);
setPlotType(PLOTTYPE_FLATLINES,2);
setPlotType(PLOTTYPE_FLATLINES,3);
setDefaultBarThickness(2,0);
setDefaultBarThickness(2,1);
setDefaultBarThickness(2,2);
setDefaultBarThickness(2,3);
}

var prevH = null;
var prevL = null;
var prev2H = null;
var prev2L = null;
var H2H = null;
var H2L = null;
var L2H = null;
var L2L = null;
var bInit = false;
var xHigh = null;
var xLow = null;

function main() {
if(bInit == false){
    xHigh = high(inv("D")); 
    xLow = low(inv("D"));
    bInit = true;
}

var prevH = xHigh.getValue(-1); 
var prevL = xLow.getValue(-1);
var prev2H = xHigh.getValue(-2);
var prev2L = xLow.getValue(-2); 
if(prev2H == null) return;//added "return" after each "if" statement otherwise only the last "if" would execute "return" if true.
if(prev2L == null) return;
if(prevH == null) return;
if(prevL == null) return;


H2H = (prevH - prev2H) + prevH;
H2L = (prevL - prev2H) + prevL;
L2H = (prevH - prev2L) + prevH;
L2L = (prevL - prev2L) + prevL;
//return;//commented out since this return stope execution every iteration

return new Array(H2H,H2L,L2H,L2L);//removed ".getValue(0)" since each is a value not a series
} 

[tcstringham]

I should have been more clear in my post. I can get the series to pull up. What I'm trying to do is have it pull up only the last value returned. That's why i was playing around with the getValue(0) command. I'm not on the machine that has the script file, but with the changes you put in above, would the getValue(0) command now work?

[waynecd]

No.

H2H = (prevH - prev2H) + prevH;
H2L = (prevL - prev2H) + prevL;
L2H = (prevH - prev2L) + prevH;
L2L = (prevL - prev2L) + prevL; 

are not a series, they are a value. Each is the last calculated individual value based on it's respective formula. So, "H2L" is the last calculation, etc. It is returning the last value for "H2L", "L2H", & "L2L".

*.getValue(#) only works with a series and series identified in the knowledgebase.

Wayne

[tcstringham]

so then is there a way to limit how far this goes back? I only want to show the last one on the chart.