Histogram
===========

Computes a histogram of the data using number of bins evenly spaced between the minimum and maximum of the specific columns.

Type
--------- 

transform

Class
--------- 

fire.nodes.ml.NodeHistoGramCal

Fields
--------- 

.. list-table::
      :widths: 10 5 10
      :header-rows: 1

      * - Name
        - Title
        - Description
      * - title
        - Title
        - Title
      * - titleColor
        - Title Color
        - 
      * - description
        - Description
        - 
      * - descriptionColor
        - Description Color
        - 
      * - chartColors
        - Chart Colors
        - 
      * - inputCols
        - Column Name
        - Name of column
      * - bins
        - Number of Bins
        - Number of Bins


Details
-------
This node creates a histogram of the data using specified number of bins evenly spaced between the minimum and maximum of the specific columns.


It outputs a chart displaying histogram and bin details in tabular format.


Chart can be viewed in Column, Bar and Line format.


Examples
-------
Incoming Dataframe has following rows:


::

    EMP_CD       |    EMP_NAME       |    DEPT       |    SALARY       |    AGE       |    DATE_OF_JOINING       |    EMAIL
    ------------------------------------------------------------------------------------------------------------------------------------
    E01          |    ANTHONY        |    HR         |    50000        |    40        |    2019-12-12            |    anthony@hrdept.com
    E02          |    LISA           |    HR         |    35000        |    35        |    2019-02-28            |    lisa@hrdept.com
    E03          |    MARTIN         |    HR         |    20000        |    25        |    2020-01-01            |    martin@nodept.com
    E04          |    DAVID          |    SALES      |    55000        |    40        |    2021-12-13            |    david@salesdept.com
    E05          |    MARK           |    SALES      |    60000        |    27        |    2020-01-01            |    mark@salesdept.com
    E06          |    JOE            |    SALES      |    40000        |    31        |    2010-01-01            |    joe@salesdept.com
    E07          |    BELLA          |    HR         |    60000        |    24        |    2001-12-12            |    bella@hrdept.com
    E08          |    ROSE           |    SALES      |    60000        |    27        |    2002-12-12            |    rose@hrdept.com
    E09          |    MICHAEL        |    SALES      |    61000        |    31        |    2003-09-12            |    michael@hrdept.com
    E10          |    PATRICK        |    HR         |    60000        |    24        |    2004-10-12            |    patrik@hrdept.com


if HistogramCal node is configured as below:


COLUMN NAME     :     SALARY

NUMBER OF BINS  :     10


then following equally spaced 10 bins would be created using MIN and MAX values of [SALARY] and same would be presented in Chart as well:


::

    index    |   range                |    count
    ----------------------------------------------------------
    1        |   20000.0 - 24100.0    |    1
    2        |   24100.0 - 28200.0    |    0
    3        |   28200.0 - 32300.0    |    0
    4        |   32300.0 - 36400.0    |    1
    5        |   36400.0 - 40500.0    |    1
    6        |   40500.0 - 44600.0    |    0
    7        |   44600.0 - 48700.0    |    0
    8        |   48700.0 - 52800.0    |    1
    9        |   52800.0 - 56900.0    |    1
    10       |   56900.0 - 61000.0    |    5