Draw and Configure a Histogram

Histograms are automatically inserted under each domain when you import your data. The plots can be configured through the Histo tab in the Property Panel when a probability plot is displayed.

1. Display the graph.
2. In the Property Panel, select the Histo tab.
3. Configure the Draw Options section. 
   • Bars / Line – This display mode defines how the histogram classes are represented:

     • When the Bars mode is selected, the histogram displays each class as a vertical bar. This representation is commonly used to visualise frequency distributions or class proportions.

     • When the Line mode is selected, the histogram is represented as a continuous curve connecting the class values. This view is useful for highlighting overall trends and smooth transitions between classes. It is also better suited for overlaying multiple distributions.

   • Log scale – Display in logarithmic scale.
   • CDF overlay – Display the CDF plot over the histogram.
   • Cumulative histogram – Display cumulative sample count on Y-axis.
   • Percentage of sample count – Display percentage of the sample count on Y-axis.
   • Gaussian frequencies – Display Gaussian (normal) distribution on Y-axis. Percentage of sample count must be active for this option to be available.
4. Configure the Bins section.
   • Bin Type – Select how data is grouped into histogram bins from Intervals and Widths.
   • Use auto-intervals – Automatically define intervals. Only available if Intervals is selected as the Bin type.
   • Number of intervals – The number of intervals to divide the data. Only available if Use auto-intervals in unchecked.
   • Use auto-width range – Use the lowest and highest values in the dataset to define the start and end values on the X-axis, respectively.
   • Range start – Value of the first bin. Only available if Use auto-width range is unchecked.
   • Range end – Value of the last bin. Only available if Use auto-width range is unchecked.
   • Bin width – Define the width of the bins. Only available if Widths is selected as the Bin type.
5. Configure the Style section. This section depends on the display mode:
   • When the Bars mode is selected, you can customize the appearance of the bars using the following options:
     • Single colour – Select a single colour for the graph.
     • Colour key – Colour the histogram by value.

       Note: If you choose a Colour Key Name you can Configure a Legend.

     • Stroke (only available when choosing the Bars mode) – Draw an outline around each class (or bar) in the histogram. This option is not activated by default.

   • When the Line mode is selected, you can adjust the visual style of the line using the following parameters:

     • Style – Define the line pattern (e.g., solid, dashed, dotted).

     • Width – Set the line thickness.

     • Colour – Specify the line colour.

6. Configure the Mouse Pointer Indicators section.
   • Show Indicators of Mouse Point – Show the intercept lines and coordinates when hovering the mouse over the graph.
   • Decimal – The number of decimals intercept coordinates display.