I want to return the absolute value of a moving average, so based on a length of "1", input values -1,-2, 3, 4 = 10

I know I need to include the math.h library, and use the fabs() function. When I adjust the code and try to implement fabs() I end up with compiler errors. Can someone please show me how this should be implemented.

Here is the basic code without using fabs().

 

Code

// Test #include "sierrachart.h" #include "math.h" SCDLLName("MABS") SCSFExport scsf_MovingAverageSimple(SCStudyInterfaceRef sc) { SCSubgraphRef Avg = sc.Subgraph[0]; SCInputRef InputData = sc.Input[0]; SCInputRef Length = sc.Input[3]; if (sc.SetDefaults) { sc.GraphName = "Moving Average - ABS"; sc.GraphRegion = 0; sc.ValueFormat = 2; sc.AutoLoop = 1; Avg.Name = "Avg"; Avg.DrawStyle = DRAWSTYLE_LINE; Avg.PrimaryColor = RGB(0, 255, 0); Avg.LineWidth = 1; Avg.DrawZeros = true; InputData.Name = "Input Data"; InputData.SetInputDataIndex(SC_LAST); Length.Name = "Length"; Length.SetInt(10); Length.SetIntLimits(1, MAX_STUDY_LENGTH); sc.FreeDLL = 0; return; } sc.DataStartIndex = Length.GetInt() - 1; sc.SimpleMovAvg(sc.BaseDataIn[InputData.GetInputDataIndex()], Avg, Length.GetInt()); }

Are you aware that you are using sc.FreeDLL = 0 ?
This in itself can be the reason for the compiling problems.

...also, in my studies I use fabs() without including math.h

I think the following may be what your looking for:

To your existing code,
Add this:
SCSubgraphRef Temp1 = sc.Subgraph[1];

and Change the last line to This:

sc.SimpleMovAvg(sc.BaseDataIn[InputData.GetInputDataIndex()], Temp1, Length.GetInt());
Avg[sc.Index] = fabs(Temp1[sc.Index]);

mkata 

I think the following may be what your looking for: To your existing code, Add this: SCSubgraphRef Temp1 = sc.Subgraph[1]; and Change the last line to This: sc.SimpleMovAvg(sc.BaseDataIn[InputData.GetInputDataIndex()], Temp1, Length.GetInt()); Avg[sc.Index] = fabs(Temp1[sc.Index]);

Nice one @mkata, you nailed it. Thanks.