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How to Decode TLV Quickly

In TLV, the format is Tag, Length, and Value. The TLV protocol needs this type of data. Here you will know how to decode TLV data. According to IBM , TLV data is three parts. The tag tells what type of data it is. The length field denotes the length of the value. The Value-field denotes the actual value. Structure of TLV. TLV comprises three field values.  Tag Length Value EMV formulated different tags. They have their meanings. Usually, the Tag and Length together takes 1 to 4 bytes. The Best example for TLV. In the below example, you can find the sample TAG, LENGTH, and VALUE fields. [Tag][Value Length][Value] (ex. " 9F4005F000F0A001 ") where Tag Name =  9F40 Value Length (in bytes) =  05  Value (Hex representation of bytes. Example, "F0" – 1-byte) =  F000F0A001 In the above message, tag 9F40 has some meaning designed by EMV company. Here  you can find a list of EMV Tags. How to read the TLV Tag: 1 or 2 bytes Length: Length of the Value. F0-00-F0-A0-01 ==> 5 By

What is Tableau Software

Stanford University Computer Science department is the origin of Tableau. The initiation started in the Department of Defense, a sponsored research project. Chris Stolte, a Ph.D. candidate, was researching visualization techniques for exploring relational databases and data cubes.

Stolte's Ph.D. advisor, Professor Pat Hanrahan, a founding member of Pixar and chief architect for Pixar's RenderMan, was a worldwide expert in the science of computer graphics.

Chris, Pat, and a team of Stanford Ph.D.s realized that computer graphics could deliver huge gains in people's ability to understand databases.

Tableau

Before Tableau

  • Their invention VizQL™ brought together these two computer science disciplines for the first time. 
  • VizQL lets people analyze data just by building drag-and-drop pictures of what they want to see. 

Tableau 8

  • While Tableau 8 improves on the previous seven major releases of the software, the core approach to visual design remains the same: connect to the desired data source, and drag various data fields to desired parts of the Tableau screen. 
  • The result is a basic visualization that can then be enhanced and modified by dragging additional data fields to different destinations in the workspace. 
  • Beyond this basic visualization approach, Tableau's Show Me feature allows quick choices of predefined visualizations by just selecting relevant data fields and clicking a thumbnail.

Tableau Basics

When you first start Tableau, you are presented with the Start Page. The largest portion of the Start Page is reserved for thumbnails of recent workbooks you have used. Simply click on any one of these to open the workbook (like Microsoft Excel, Tableau's format for storing data on your disk drive is in a workbook, with a .TWB or .TWBX file extension). 

You may also open sample workbooks included with Tableau 8 by clicking the desired thumbnail at the bottom of the Start Page. 


If you want to create a new workbook, you must first connect to a data source (types of data sources Tableau works with include industry-standard databases such as Oracle or Microsoft SQL Server, Microsoft Excel spreadsheets, text files, and so forth). Unlike spreadsheet or word processing programs, Tableau must connect to some existing data before you can create a visualization. 


Certain data sources, known as saved data sources, will appear on the left side of the Start Page. These "pointers" to an existing data source can be selected by simply clicking them. If you want to connect to a different data source, click the Connect to Data tab (the tab with the "barrel" icon) in the upper right, or click Connect to Data in the upper left under the Data section. 


Once you've connected to a data source, a new workspace will appear where you can drag and drop desired data fields.

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