2.1.23.2.17 ocmath_xy_remove_duplicates

1 Description
2 Syntax
3 Parameters
4 Return
5 Examples
6 Remark
7 See Also
8 Header to Include
9 Reference

Description

This function remove duplicated points and replace duplicated points by nMethod, where 0 means replace with mean, 1=median, 2=min, 3=max, 4=sum

Syntax

int ocmath_xy_remove_duplicates(double * px, double * py, UINT nSize, int nMethod = Replace_With_Mean, double dPrecision = 1.0e-8, bool bSort = TRUE, double * duppx = NULL, double * pCounts = NULL, int * pnSizeDuppx = NULL )

Parameters

px: [modify] on input, it contains X coordinate's datas; on output, contains X coordinate's datas removed duplicates
py: [modify] on input, it contains Y coordinate's datas; on output, contains Y coordinate's datas removed duplicates
nSize: [input] size of px, py
nMethod: [input] replace duplicates methods, where 0 means replace with mean, 1=median, 2=min, 3=max, 4=sum
dPrecision: [input] precision to determine whether two points are duplicated or not
bSort: [input] if TRUE, will sort px, then reorder py by px's index.
duppx: [output] An array to hold the duplicate x values. Before calling, need alloc enough memory for it.
pCounts: [output] An array to hold the number of each duplicate x values. Before calling, need alloc enough memory for it.
pnSizeDuppx: [output] the count of dupplicate

Return

Return number of points in px, py after removed duplicates if succeed, otherwise, negative error code is returned.

Examples

EX1

//Before running, make sure the active layer is a graph with dataplot containing curve's X/Y data
void ocmath_xy_remove_duplicates_ex1()
{
    GraphLayer gl = Project.ActiveLayer();
    if (!gl)
    {
        return;
    }
    
    DataPlot dp = gl.DataPlots(0);        
    DataRange dr;
    vector vxData, vyData;
    if(dp.GetDataRange(dr))
    {
        DWORD dwPlotID;
        if(dr.GetData(DRR_GET_DEPENDENT | DRR_NO_FACTORS, 0, &dwPlotID, NULL, &vyData, &vxData) < 0)
        {
            printf("get_plot_data failed GetData");
            return;
        }
    }

    uint nDataSize = vxData.GetSize();
    int nMethod = Replace_With_Mean;
    double dPrecision = 1.0e-8;
    int nRet;
    nDataSize = ocmath_xy_remove_duplicates(vxData, vyData, nDataSize, nMethod, dPrecision);
    if( nDataSize < OE_NOERROR )
    {
        printf("error code: %d\n", nRet);
        return;
    }
    vxData.SetSize(nDataSize);
    vyData.SetSize(nDataSize);
    WorksheetPage wksPage;
    wksPage.Create();
    Worksheet wksResult = wksPage.Layers(0);
    //wksResult.AddCol("Indices");
    int nXCol, nYCol;
    nXCol = wksResult.AddCol("X");
    nYCol = wksResult.AddCol("Y");
    //wksResult.Columns(0).SetType(OKDATAOBJ_DESIGNATION_X);
    wksResult.Columns(nXCol).SetType(OKDATAOBJ_DESIGNATION_X);
    wksResult.Columns(nYCol).SetType(OKDATAOBJ_DESIGNATION_Y);
    DataRange drOut;
    drOut.Add("X", wksResult, 0, nXCol, -1, nXCol);
    drOut.Add("Y", wksResult, 0, nYCol, -1, nYCol);
    drOut.SetData(&vyData, &vxData);
    gl.AddPlot(drOut, IDM_PLOT_SCATTER, GAP_ALLOW_DUPLICATE_COL | GAP_USE_TEMPLATE);
}