Distributions

image

Displays value distributions for a single attribute.

Signals

Inputs:

Input data set.

Outputs:

Description

Distributions displays value distribution of discrete or continuous attributes. If the data contains class variable, distributions are conditioned on the class.

Distribution for a discrete feature

For discrete attributes, the graph displayed by the widget shows how many times (e.g., in how many instances) each attribute value appears in the data. If the data contains a class variable, class distributions for each of the attribute values will be displayed as well (like in the snapshot above). The widget may be requested to display only value distributions for instances of certain class (Group by).

Distribution for a continuous feature

For continuous attributes, the attribute values are discretized and value distribution is displayed as a histogram. Class probabilities for the continuous attributes are obtained through loess smoothing, while the appearance of the curve is set in Show continuous variables by.

In class-less domains, the bars are displayed in gray.

Distribution with no class variable