source: orange/docs/widgets/rst/data/selectattributes.rst @ 11778:ecd4beec2099

Revision 11778:ecd4beec2099, 1.7 KB checked in by Ales Erjavec <ales.erjavec@…>, 5 months ago (diff)

Use new SVG icons in the widget documentation.

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1.. _Select Attributes:
2
3Select Attributes
4=================
5
6.. image:: ../../../../Orange/OrangeWidgets/Data/icons/SelectAttributes.svg
7   :alt: Select Attributes icon
8
9
10Signals
11-------
12
13Input:
14  - Examples (ExampleTable)
15      Attribute-valued data set.
16
17Outputs:
18  - Examples (ExampleTable)
19      Attribute-valued data set composed using the domain
20      specification constructed using the widget.
21
22Description
23-----------
24
25Select Attributes widget is used to manually compose your data
26domain, that is, to decide which attributes will be used and how.
27Orange distinguishes between ordinary attributes, an (optional) class
28attributes and meta attributes. For instance, for building a classification
29model, the domain would be composed of a set of attributes and a discrete class
30attribute. Meta attributes are not used in modelling, but several widgets can
31use them  for providing optional labels to instances.
32
33Orange attributes are typed and are either discrete, continuous or
34a character string. The attribute type is marked with a symbol appearing
35before the name of the attribute (D, C, S, respectively).
36
37Changes made to the domain are propagated to the output by pressing an
38Apply button. Reset will present the attributes as defined in original
39domain in the data set from the input signal
40
41.. image:: images/SelectAttributes.png
42   :alt: Select Attributes widget example
43
44Examples
45--------
46
47Below is a simple example how to use this widget. The input is fed directly
48from  the :ref:`File` widget, and the output to the :ref:`Data Table` widget.
49We have also linked the former to the File widget so that one can inspect the
50difference in the domain composition.
51
52.. image:: images/SelectAttributes_schema.png
53   :alt: Select Attributes schema
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