Bar Chart (Labs)

A bar chart visualization node.The view can be accessed either via the “interactive view” action on the executed node or on KNIME WebPortal.
In the node configuration, you can choose the aggregation method and enable certain controls, which are then available in the view. This includes the ability to choose different columns for the category and frequency axis or the possibility to set a title. The configuration also offers a preview of the view, which should help to get the bar chart fast in the desired shape. Since missing values as well as NaN (not a number) or infinite values cannot be displayed in the view, they will be omitted.

Note, this node is currently under development. Future versions of the node might have improved or changed functionality. Interactivity between multiple views is currently only possible with view also coming from this labs extension.

Options

Category dimension

Select the column that contains the category values. Note: Missing values are treated as separate category.

Aggregation

Select the aggregation method used on the selected frequency columns. In case of “None” every row of the table is treated as a separate category. Note that in this case duplicate categories can exist. In case of “Occurrence Count” the occurrence of the number of rows that share a given category is determined.

Frequency dimensions

Select the columns with frequencies for which you wish to plot bars. Note: Missing values in the frequency column will be ignored with a corresponding warning message. If, after aggregation, some bars or entire categories contain only missing values, they will be excluded from the view and a warning message will be raised.

Title

The title of the graph shown above the generated image. If left blank, no title will be shown.

Category axis label

The label used for the category axis. If left blank, no label will be shown.

Frequency axis label

The label used for the frequency axis. If left blank, no label will be shown.

Orientation

When “Horizontal” is selected, the bar chart is plotted horizontally. By default bar chart is plotted with vertical bars.

Arrange bars

When “Stacked” is selected, the bars of the same category are stacked on top of each other.

Display legend

When checked, the chart’s legend is displayed.

Show bar values

When checked, the values will be shown on top of each bar.

Enable image download

When checked, an image of the chart can be downloaded by clicking the image download button in the view.

Show tooltip

When checked, hovering over a bar will show information about the data.

Publish Selection

When checked, the view notifies other interactive views when the user changes the selection in the current view.

Subscribe to Selection

When checked, the view reacts on notifications from other interactive views that the selection has been changed.

Enable animation

When checked, the animation of the graph is active.

Views

Bar Chart (Labs)

A bar chart visualization of the input data.

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