Pie Chart (JFreeChart)

Node to display a pie chart with JFreeChart. The size of the slices (sectors) of the pie represent the relative number of instances of this particular value to the whole number of instances in the input data table. For general settings of the generated image, see the "General Plot Options" Tab.

Options

Pie Chart Options

Column: Select the categorical column, for which the chart will be created.
Show legend: This is a boolean indicating whether or not the legend should be in the visualization.
3D pie chart: This is a boolean switch to activate/deactivate 2D(off) or 3D(on) pie chart.
Attribute to explode: This option allows the user to select and explode one of the possible nominal values for the selected column for visualization. It is only used in the 2D plot.

General Plot Options

Type of Image: The type of the created image can either be png or svg. PNGs are mostly smaller, SVGs provide details about plot and the possibility to be changed individually.
Title of Graph: The title of the graph shown above the generated image. If the title is not activated, no title will be shown.
Width of Image (in pixel): The width of the generated image, not the plot width.
Height of Image (in pixel): The height of the generated image, not the plot height.
Background Color: The color of the background of the image. Hence this color is used for the area behind and around the plot as well as behind potential axis and legends.
Plot Background Color: The color of the background of the plot. Hence this color is used for the empty space in a plot.
Plot Background Alpha: The transparency of the plot background can be modified using an additional alpha value. An alpha value of 1 does not change the background transparency. Decreasing the alpha value will increase the plot background transparency.
Scale Font Size: Factor changes the font sizes within the JFreeChart view. A value greater the 1 increases all view fonts, a value between 0 and 1 decrease them.

Input Ports

: Data table containing the data for the pie chart

Output Ports

: The image of the plot (SVG or PNG)

Popular Predecessors

Popular Successors

Views

Pie Chart: Displays the pie chart of the input data.

Workflows

Developers

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Installation

To use this node in KNIME, install the extension KNIME JFreeChart from the below update site following our NodePit Product and Node Installation Guide:

v5.9

A zipped version of the software site can be downloaded here.

Plugin provider: KNIME AG, Zurich, Switzerland

Plugin version: 5.9.0.v202511132127

On NodePit since: 2025-12-11

Last update: 2026-01-21

KNIME versions: Since v3.6

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