Column Plot

Version Info

Minimum Origin Version Required: Origin80 SR0

Plot Float Column with Indexing Color

Example Data

New a worksheet, make sure worksheet page name is "Book1", copy the following example data to worksheet.

Col(A)  Col(B)  Col(C)        Col(D)
A       30      196.087         1
B       0       197.747         1
C       10      1.693           2
D       0       -2.194          2
E       10      33.214          4
F       10      -35.101         4
G       0       -16.713         6
H       0       15.993          6

Example Code

Run the following function to plot a float column, and set the color of columns depend on column D.

void float_column_plot_ex()
{
        WorksheetPage wksPage("Book1");
        Worksheet wks = wksPage.Layers(0);
        if( wks )
        {
                DataRange dr;
                dr.Add(wks, 0, "X");
                dr.Add(wks, 1, "Y");
                dr.Add(wks, 2, "Y");
                
                GraphPage gp;
                gp.Create("FLOATCOL");
                GraphLayer gl = gp.Layers(0);
                if( gl.AddPlot(dr, IDM_PLOT_COLUMN_FLOAT) >= 0 )
                {
                        gl.Rescale();
                        
                        // Set column D as color index
                        const int nIndexingBegin = 100;
                        int nFillColor = nIndexingBegin + 2; // column D is the 3rd Y column, Origin C index offset is 0, so add 2 here.
                        
                        Tree tr;
                        tr.Root.Columns.Column1.Pattern.Fill.FillColor.nVal = nFillColor;
                        if( 0 == gl.UpdateThemeIDs(tr.Root) )
                        {
                                bool bRet = gl.ApplyFormat(tr, true, true);
                        }
                } 
        }
}