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Date/Time: Tue, 07 May 2024 19:29:46 +0000

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[Programming Help] - plot multiple subgraphs to different regions from single study

View Count: 980

[2020-10-22 19:25:01]
[Go To First Post]
jomo88 - Posts: 47
I came up with the following solution. I am wondering if it is the most efficient solution memory wise and/or computationally. Running multiple instances of the study that I want to plot subgraphs from is not an option, as it has already maxed out computer resources.

#include "sierrachart.h"
SCDLLName("PlotStudyData")
SCSFExport scsf_PlotStudyData(SCStudyInterfaceRef sc)

{
SCSubgraphRef Subgraph_Copy = sc.Subgraph[0];
SCInputRef StudySubgraphReference = sc.Input[0];

if (sc.SetDefaults)
{
Subgraph_Copy.Name = "Copy For Region Plot";
Subgraph_Copy.DrawStyle = DRAWSTYLE_LINE;
Subgraph_Copy.PrimaryColor = RGB(0,255,0);
Subgraph_Copy.DrawZeros = false;
  
StudySubgraphReference.Name = "Study And Subgraph To Display";
StudySubgraphReference.SetChartStudySubgraphValues(1,1,3); // Chart, Study, Subgraph
return;
}

SCFloatArray StudyReference;
sc.GetStudyArrayFromChartUsingID(StudySubgraphReference.GetChartStudySubgraphValues(), StudyReference);

for (int Index = sc.UpdateStartIndex; Index < sc.ArraySize; Index++)
{
Subgraph_Copy[Index] = StudyReference[Index];
}

}

Can you advise me if this is the optimal solution? I am assuming this study will use the memory required to store just Subgraph_Copy. Is memory being used twice with StudyReference? I think its required, correct?

Thank you
Date Time Of Last Edit: 2020-10-22 19:45:10
[2020-10-25 11:17:12]
[Go To First Post]
bradh - Posts: 854
I cannot say this is optimal, but I think a simpler workaround would be to add a spreadsheet formula that references a (hidden) subgraph of your study.
[2020-10-31 04:06:53]
[Go To First Post]
jomo88 - Posts: 47
For anyone looking, you can find the following code from Studies2.cpp, it works well. Also, good info is at Referencing Other Time Frames and Symbols When Using the ACSIL



#include "sierrachart.h"
SCDLLName("StudySubgraphReference")
SCSFExport scsf_StudySubgraphReference(SCStudyInterfaceRef sc)
{
  SCSubgraphRef Subgraph_StudySubgraphReference = sc.Subgraph[0];

  SCInputRef Input_StudySubgraphReference = sc.Input[0];
  SCInputRef Input_DrawZeros = sc.Input[1];

  // Set configuration variables

  if (sc.SetDefaults)
  {
    sc.GraphName = "Study Subgraph Reference";
    sc.GraphRegion = 2;

    sc.ScaleRangeType = SCALE_AUTO;

    Subgraph_StudySubgraphReference.Name = "Study Subgraph";
    Subgraph_StudySubgraphReference.DrawStyle = DRAWSTYLE_LINE;
    Subgraph_StudySubgraphReference.PrimaryColor = RGB(0, 255, 0);

    Input_StudySubgraphReference.Name = "Study Subgraph to Reference";
    Input_StudySubgraphReference.SetStudySubgraphValues(0, 0);

    Input_DrawZeros.Name = "Draw Zeros";
    Input_DrawZeros.SetYesNo(true);
    
    sc.CalculationPrecedence = VERY_LOW_PREC_LEVEL;

    sc.AutoLoop = 0;

    return;
  }


  // Do data processing
  Subgraph_StudySubgraphReference.DrawZeros = Input_DrawZeros.GetYesNo();

  //This will return sc.UpdateStartIndex or an earlier index if this study is calculated after a study which calculated at an earlier index and supports setting that earlier index.
  int ActualStartIndex = sc.GetCalculationStartIndexForStudy();

  // Get the array for the specified Input Data from the specified studies
  SCFloatArray Study1Array;
  sc.GetStudyArrayUsingID(Input_StudySubgraphReference.GetStudyID(), Input_StudySubgraphReference.GetSubgraphIndex(), Study1Array);

  for (int BarIndex = ActualStartIndex; BarIndex < sc.ArraySize; BarIndex++)
  {
    Subgraph_StudySubgraphReference[BarIndex] = Study1Array[BarIndex];
  }

  sc.EarliestUpdateSubgraphDataArrayIndex = ActualStartIndex;
}

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