.. _data_table:

Data Table Tab
==============

The Data Table Tab is useful for exploring the data numerically. It also provides
a number of processing tools to sort and rank the data on certain criteria.

.. figure:: images/data_table.png
   :alt: Data Table Tab of Visualizer

   User Interface of the Data Table Tab

Data Processing
~~~~~~~~~~~~~~~

-  **Apply Filters:** This checkbox determines whether you are looking
   at the raw data or data with the global filters applied.
-  **Method:** This select input allows you to select the method, if
   any, that is used to process the data. Currently the only method that
   is available is the TOPSIS.

TOPSIS
~~~~~~

The Technique for Order of Preference by Similarity to Ideal Solution
(TOPSIS) is a multi-criteria decision analysis method, which was
originally developed by Hwang and Yoon in 1981 with further developments
by Yoon in 1987, and Hwang, Lai and Liu in 1993. [1]_ We rely
upon the implementation available in the 'topsis' package on CRAN.

-  **Ranking Metrics:** This select input allows the user to specify the
   metrics of interest.
-  **Clear Metrics:** Clicking this button resets this tab.
-  **Ranking Mode:** This specifies the objective for each of the
   variables.
-  **Weight Amount:** This specifies the relative weight of each
   objective.

The *rank* and *score* columns appear when data ranking is being used.
The table is sorted by ascending rank. A score between 0 and 1 is
assigned to each point based on the results of the TOPSIS analysis.

Adding Classifications
~~~~~~~~~~~~~~~~~~~~~~

This allows the user to add the ranking column to the global dataset as
a *classification*.

Data Table
~~~~~~~~~~

The data table itself is interactive and can be sorted and searched.

------

**Footnotes**

.. [1] https://en.wikipedia.org/wiki/TOPSIS