ExcelChart chart = worksheet.Drawings.AddChart("FindingsChart", OfficeOpenXml.Drawing.Chart.eChartType.XYScatter);
                chart.Title.Text = "Category Chart";
                chart.SetPosition(1, 0, 3, 0);
                // chart.SetSize(800, 300);
                var ser1 = (ExcelChartSerie)(chart.Series.Add(worksheet.Cells["A1:A" + countRows.ToString()], worksheet.Cells["B1:B" + countRows.ToString()]));
                //var ser1 = (ExcelChartSerie)(chart.Series.Add(worksheet.Cells["A1:A10"], worksheet.Cells["B1:B10"]));

                chart.YAxis.LogBase = Math.E;