.. _`Select columns in Table`:

.. _`org.sysess.sympathy.data.table.selecttablecolumns`:

Select columns in Table
```````````````````````

.. image:: select_table_columns.svg
   :width: 48


Select columns from input to propagate to output.




Documentation
:::::::::::::

There are many situations where you may want to throw away some of the columns
of a table. Perhaps the amount of data is large and you want to trim it to
increase performance, or perhaps some column was just needed as an intermediary
step in some analysis.


Definition
::::::::::


Input ports
...........

    **<unnamed>**
        | Type: table
        | Description: Input

Output ports
............

    **<unnamed>**
        | Type: table
        | Description: Output



Configuration
.............

    **Select columns** (columns)
        Select columns.





Related nodes
.............

* :ref:`org.sysess.sympathy.data.table.selecttablescolumns`

* :ref:`org.sysess.sympathy.data.table.selecttablecolumnstype`

* :ref:`org.sysess.sympathy.data.table.selecttablecolumnsregex`

* :ref:`org.sysess.sympathy.data.table.selecttablecolumnsfromtable`




Examples
........



Example flows demonstrating this node:

* :download:`SelectColumns.syx </Examples/Sympathy for Data/Data Processing/Select/SelectColumns.syx>`




The node can be found in:

* :download:`ADAF example.syx </Examples/Sympathy for Data/Misc/ADAF example.syx>`

* :download:`ADAF example with subflow.syx </Examples/Sympathy for Data/Misc/ADAF example with subflow.syx>`

* :download:`Regression.syx </Examples/Sympathy for Data/MachineLearning/Regression.syx>`

* :download:`Metrics.syx </Examples/Sympathy for Data/MachineLearning/Metrics.syx>`

* :download:`ConvertColumnsInTable.syx </Examples/Sympathy for Data/Data Processing/Data/ConvertColumnsInTable.syx>`

* :download:`KmeansOutlierRemoval.syx </Examples/Advanced Machine Learning/KmeansOutlierRemoval.syx>`

* :download:`random_forest_regressor.syx </Examples/Advanced Machine Learning/random_forest_regressor.syx>`

* :download:`Depth_from_stereo_images.syx </Examples/Image Analysis/Depth_from_stereo_images.syx>`

* :download:`audio_processing.syx </Examples/Time Series/audio_processing.syx>`

* :download:`Cyclic_data.syx </Examples/Time Series/Cyclic_data.syx>`




Implementation
..............

.. automodule:: node_select_table_columns
    :noindex:

.. class:: SelectColumnsTable
    :noindex: