Table Of Contents

User Guide

Features

Note

Using Siren, a user can explore data of his interest by interactively visualizing, editing and mining redescriptions.

The main features of Siren can be categorized into mining, visualizing and editing.

Visualizing

Siren offers a number of different visualizations.

Parallel Coordinates

A parallel coordinates plot represents the values taken by the entites for the variable appearing in the queries. It allows to easily visualize the impact of the queries conditions on the support of the redescription.

../_images/PacoView.png

Trees diagram

A tree diagram visualizes the queries as decision trees, linked through their leaves. It helps understand the structure of tree-based queries, which can otherwise appear rather complex.

../_images/TreeView.png

2D Projections

The axis projection and a number of data projections from the scikit-learn package allow to highlight different aspects of the data.

../_images/MDSView.png

Maps (for geospatial data)

When the entities are geographic locations, we qualify the redescriptions as geospatial. In that case, it is most natural to display the redescriptions projected on a map, to show the locations where both queries hold, only the left hand side query holds and only the right hand side query holds.

../_images/MapView.png

Display modes

Visualizations can be displayed either in their own windows separate from the main application window or in a dedicated grid of illustrations in the main application window. In addition, the main window can be split horizontaly into two frames in order to examine at the same time a list of redescriptions and several visualizations.

../_images/VizSplitFrame.png

Editing and Selecting

Existing redescriptions can be edited and the visualization and statistics will be recomputed and changes reflected in the original redescription in the list and other visualizations of that same redescription.

../_images/ViewsSide.png

It is also possible to build a new redescription from scratch.

Dragging the interval boxes in the parallel coordinates plot allows to edit the redescription interactively.

../_images/PacoEdit.png

Similarly, clicking on the leaves in a tree diagram allows to add and remove branches to the queries. The resulting diagram can then be simplified automatically.

../_images/TreeEdit.png

The user can select single entites from a view by clicking the corresponding dot/line in a view.

../_images/SelectDot.png

In addition, the user can also select a subset of entities by drawing a enclosing polygon directly on the view.

../_images/SelectPoly.png

Mining

At the core of Siren is the ReReMi redescription mining algorithm. Various modes of interaction with the mining algorithm are possible through the interface.

  • Mine redescriptions from the data automatically.
  • Mine extensions of an existing redescription, on both sides or selectively on one side.
  • It is possible to select a subset of variables for use in mining/expanding, by disabling some variables and to specify a subset of entities of interest to emphasize.
Siren in action

Postprocessing

It can be useful to filter redundant redescriptions, that is, redescriptions that cover approximately the same entities even if they have (somewhat) different sets of variables.

This can be done automatically, by either selecting a redescription and asking Siren to filter out all redescriptions that are redundant with respect to the selected one, or by letting it go through the whole list of redescriptions filtering out all redescriptions that are redundant with respect to some earlier-encountered (i.e. better) redescription.

../_images/FilterRedundant.png

k-fold testing

To help study how well the redescriptions mined using a particular set of parameters generalize to unseen entities, Siren allows to easily partition the data, run the algorithm on a selected subset of the data and compare accuracy and support of the results.

../_images/KFolds.png