Bar Chart (JFreeChart)

This view shows one bar chart visualizing the occurrence count for each value and each selected nominal column. It doesn't support highlighting and row coloring. For general settings of the generated image, see the "General Plot Options" Tab.

Options

Bar Chart Options

X Columns
Selects the columns containing the nominal values to be plotted
xLabels rotation angle
Changes the way the xLabels are arranged. An angle of 90 degree means a vertical alignment. Possible values range between -90 and 90 degrees.
Color
Specifies the color of the bar chart representing the first column
Label for x axis
If activated the x-axis is named accordingly
Label for y axis
If activated the y-axis is be named accordingly
Show legend
Switches the legend on/off

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

Icon
Data table with at least one nominal column

Output Ports

Icon
The image of the plot (SVG or PNG)

Popular Predecessors

Popular Successors

Views

bar chart
Displays the bar chart of the input data.

Workflows

Links

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: 2026-01-15
KNIME versions: Since v3.6

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