Histogram (legacy)

Displays a histogram view with different viewing options.

The user can change the following view properties on the fly:

  1. Aggregation method (count, summary, average)
  2. Bar size
  3. Show empty intervals
  4. Show missing value bar
  5. Layout
  6. Zooming
  7. ...
The bars are colored in proportion to the aggregation value. Hiliting is not supported.

The Invalid_values bin contains values that can not be assigned to a regular bin e.g. NaN for a double value. The bin is displayed by default if the selected binning column contains an invalid value in the input table. To hide it go to the "Bin settings tab" of the node view and deselect the "Show invalid value bin" option.

All automatically created bins, except the first one, are left open intervals (a,b] where a is excluded and b is included in the interval. To cover all values the first interval is a closed interval [a,b] where a and b are included. In order to provide nicer bin intervals the left border is set to 0 if possible.

This view is particularly well suited for extremely large datasets. For more interaction and hiliting support use the "Interactive Histogram" node.

Only columns with a valid domain are available in this view. To set the domain use the DomainCalculator or ColumnFilter node!


Display all rows
If selected the histogram view displays all rows of the incoming data.
No. of rows to display
Defines the number of rows to be displayed in the histogram. This option is disabled if the 'Display all rows' option is selected.
Binning column
This is the column to be shown on the x axis of the histogram view. For numerical values the number of bars can be adjusted later in the 'Bar settings' section of view properties.
Aggregation column
This is the column to be used as the bar value and displayed on the y axis. Only numerical values with a valid domain are allowed. The aggregation method can be adjusted later in the 'Aggregation setting' section of view properties .
Number of bins
The number of bins to create for a numerical x axis column. If the selected x column is nominal this value is ignored.

Input Ports

The data table to be displayed.

Output Ports

This node has no output ports


Histogram View
Displays the data in a histogram view.




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