How to: Show Numerical Data Using a Logarithmic Scale

  • 2 minutes to read

This example demonstrates how to use a logarithmic scale in XtraCharts, which is disabled by default.

NOTE

The logarithmic scale is only compatible with the numerical scale type.

To enable it, simply set the AxisBase.Logarithmic property to true, and set the AxisBase.LogarithmicBase property to the value required in your scenario.

using System;
using System.Windows.Forms;
using DevExpress.XtraCharts;

namespace LogarithmicScale {
    public partial class Form1 : Form {
        public Form1() {
            InitializeComponent();
        }

        private void btnLogarithm10_Click(object sender, EventArgs e) {
            AxisY axis = ((XYDiagram)chartControl1.Diagram).AxisY;
            axis.Logarithmic = true;
            axis.LogarithmicBase = 10;
            axis.WholeRange.AlwaysShowZeroLevel = false;
        }

        private void btnLogarithm100_Click(object sender, EventArgs e) {
            AxisY axis = ((XYDiagram)chartControl1.Diagram).AxisY;
            axis.Logarithmic = true;
            axis.LogarithmicBase = 100;
            axis.WholeRange.AlwaysShowZeroLevel = false;
        }

        private void btnDisableLogarithm_Click(object sender, EventArgs e) {
            AxisY axis = ((XYDiagram)chartControl1.Diagram).AxisY;
            axis.Logarithmic = false;
            axis.WholeRange.AlwaysShowZeroLevel = true;
        }
    }
}