What is wrong with that ? Arraly pole1 and pole2 empty ?!?!

February 26th, 2017, 04:54 AM

Hi, i got a simple code , but arrays pole1 and pole2 remain empty ? Why ?
Pls HELP

....

dave

p.s.: Original sierra code with
InputArray1.SetStudySubgraphValues(0,0);
sc.GetStudyArrayUsingID(

works just fine ...... i don`t get it
I just need get arrays from another chart ....

Code

#include "c:\uziv\trade\1510\ACS_Source\sierrachart.h"

SCDLLName("KORELACE") 

/*==========================================================================*/
SCSFExport scsf_korelace(SCStudyInterfaceRef sc)
{
	SCSubgraphRef CC1 = sc.Subgraph[0];

	SCInputRef InputArray1 = sc.Input[0];
	SCInputRef InputArray2 = sc.Input[1];

	SCInputRef Length = sc.Input[6];

	if(sc.SetDefaults)	
	{
		sc.GraphName = "KORELACE";

		sc.GraphRegion = 1;

		CC1.Name = "CC1";
		CC1.DrawStyle = DRAWSTYLE_LINE;
		CC1.PrimaryColor = RGB(255,0,0);
		CC1.DrawZeros = true;

					
		InputArray1.Name = "CC1 - Instrument 1";
		InputArray1.SetChartStudySubgraphValues(1, 0, 0);
		InputArray2.Name = "CC1 - Instrument 2";
		InputArray2.SetChartStudySubgraphValues(1, 0, 0);


		Length.Name = "Interval";
		Length.SetInt(200);

		sc.AutoLoop = 1;
		sc.FreeDLL = 1;
		sc.CalculationPrecedence = LOW_PREC_LEVEL;
		
		return;
	}


//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

// Definovani Poli Pro Prevzeti Dat z Externich Grafu

	sc.DataStartIndex = Length.GetInt();

	SCFloatArray pole1;
	sc.GetStudyArrayFromChartUsingID(InputArray1.GetChartStudySubgraphValues(), pole1);
	if(pole1.GetArraySize() < sc.ArraySize)
		return;

	SCFloatArray pole2;
	sc.GetStudyArrayFromChartUsingID(InputArray2.GetChartStudySubgraphValues(), pole2);
	if(pole2.GetArraySize() < sc.ArraySize)
		return;

	CC1[sc.Index] = sc.GetCorrelationCoefficient(pole1, pole2, Length.GetInt());

}

February 26th, 2017, 11:37 AM

As you ca see here:

InputArray1.Name = "CC1 - Instrument 1";
InputArray1.SetChartStudySubgraphValues(1, 0, 0);
InputArray2.Name = "CC1 - Instrument 2";
InputArray2.SetChartStudySubgraphValues(1, 0, 0);

Both InputArray1 and InputArray2 point to Subgraph 0 of Study 0 on Chart 1.
Is this want you want? Are you using the default settings ?

February 26th, 2017, 12:11 PM

I know ... but it isn`t a problem ....
If i change it ........ no solution ........ same problem .......

February 26th, 2017, 01:43 PM

I added to the code a few lines that send the values of the compared 2 arrays to the message log. As you can see in the attached txt file the arrays are definitely not empty. I compared the Sp-TICK and NYSE-Tick, not CCIs.
One reason for getting zeros in the arrays is if the chart on which you apply the study has a larger sc.ArraySize (More bars) than the charts that you reference. In this case pole1[sc.Index] and pole2[sc.Index] will have zeros for sc.Index values that are larger than the last sc.Index on those charts.

p.s here is your code with the addition of the lines that send the arrays values to the message log.

#include "sierrachart.h"

SCDLLName("KORELACE")

/*=============================================*/
SCSFExport scsf_korelace(SCStudyInterfaceRef sc)
{
SCSubgraphRef CC1 = sc.Subgraph[0];

SCInputRef InputArray1 = sc.Input[0];
SCInputRef InputArray2 = sc.Input[1];

SCInputRef Length = sc.Input[6];

if(sc.SetDefaults)
{
sc.GraphName = "KORELACE";

sc.GraphRegion = 1;

CC1.Name = "CC1";
CC1.DrawStyle = DRAWSTYLE_LINE;
CC1.PrimaryColor = RGB(255,0,0);
CC1.DrawZeros = true;

InputArray1.Name = "CC1 - Instrument 1";
InputArray1.SetChartStudySubgraphValues(1, 0, 0);
InputArray2.Name = "CC1 - Instrument 2";
InputArray2.SetChartStudySubgraphValues(1, 0, 0);

Length.Name = "Interval";
Length.SetInt(200);

sc.AutoLoop = 1;
sc.FreeDLL = 1;
sc.CalculationPrecedence = LOW_PREC_LEVEL;

return;
}

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

// Definovani Poli Pro Prevzeti Dat z Externich Grafu

sc.DataStartIndex = Length.GetInt();

SCFloatArray pole1;
sc.GetStudyArrayFromChartUsingID(InputArray1.GetChartStudySubgraphValues(), pole1);
if(pole1.GetArraySize() < sc.ArraySize)
return;

SCFloatArray pole2;
sc.GetStudyArrayFromChartUsingID(InputArray2.GetChartStudySubgraphValues(), pole2);
if(pole2.GetArraySize() < sc.ArraySize)
return;

SCString str;
str.Format("NYSE_ Tick = %f ------ SP Tick = %f",pole1[sc.Index], pole2[sc.Index]);
sc.AddMessageToLog(str, 0);

CC1[sc.Index] = sc.GetCorrelationCoefficient(pole1, pole2, Length.GetInt());

}

February 27th, 2017, 10:21 AM

Code

#include "c:\uziv\trade\1510\ACS_Source\sierrachart.h"

SCDLLName("KORELACE") 

/*==========================================================================*/
SCSFExport scsf_korelace(SCStudyInterfaceRef sc)
{
	SCSubgraphRef CC1 = sc.Subgraph[0];


	SCInputRef InputArray1 = sc.Input[0];
	SCInputRef InputIndex = sc.Input[1];
	

	SCInputRef Length = sc.Input[3];

	if(sc.SetDefaults)	
	{
		sc.GraphName = "KORELACE";

		sc.GraphRegion = 1;

		CC1.Name = "CC1";
		CC1.DrawStyle = DRAWSTYLE_LINE;
		CC1.PrimaryColor = RGB(255,0,0);
		CC1.DrawZeros = true;


		InputArray1.Name = "Instrument 1";
		InputArray1.SetChartNumber(1);

		InputIndex.Name = "Input Index";
		InputIndex.SetInputDataIndex(SC_LAST);


		Length.Name = "Interval";
		Length.SetInt(200);

		sc.AutoLoop = 1;
		sc.FreeDLL = 1;
		sc.CalculationPrecedence = LOW_PREC_LEVEL;
		
		return;
	}


//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

// Definovani Poli Pro Prevzeti Dat z Externich Grafu

	sc.DataStartIndex = Length.GetInt();


	SCFloatArray pole1;
	sc.GetChartArray(-InputArray1.GetChartNumber(), InputIndex.GetInputDataIndex(), pole1 );
	
	int Chart1Index = sc.GetNearestMatchForDateTimeIndex(InputArray1.GetChartNumber(), sc.Index);
	

	//CC1[sc.Index] = pole1[Chart1Index];
	CC1[sc.Index] = sc.GetCorrelationCoefficient(pole1[Chart1Index], sc.BaseDataIn[SC_LAST] , Length.GetInt());

	
}

------

I got a problem with make this function work ......

error C2664: 'float s_sc::GetCorrelationCoefficient(SCFloatArrayRef,SCFloatArrayRef,int)' : cannot convert parameter 1 from 'float' to 'SCFloatArrayRef'

Howto get a correlation coefficient from basedata and referenced sc_last ..... ?

Thanks a lot
dave

March 17th, 2017, 07:56 PM

If you delete this [Chart1Index] from your function call it should compile.

The last line should read sc.GetCorrelationCoefficient(pole1, sc.BaseDataIn[SC_LAST] , Length.GetInt());

What is wrong with that ? Arraly pole1 and pole2 empty ?!?!

Discussion in Sierra Chart

What is wrong with that ? Arraly pole1 and pole2 empty ?!?!