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MATLAB : Fourier transform

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By Nuno Nogueira, CC BY-SA 2.5, https://commons.wikimedia.org/w/index.php?curid=3912826 MATLAB has been  crucial programming language across worldwide that let us express matrix and array mathematics directly. In signal processing and communication it plays vital role in analysing and exploring time series data in time domain or frequency domain. For analysing non periodic signals in frequency domain we use Fourier transform instead of Fourier series ,which is used to express periodic signals in terms of infinite sum of sinusoidal terms .   Fourier transform can exist for :      1. Energy signals      2. Power signals       3. Impulse signals  That means absolutely integrable signals can have their Fourier transform only.  Formula for Fourier transform;   Then its come to use Fourier transform in MATLAB. So here is the code for Fourier transform of sinusoidal wave , for any other signal we ...
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What is AutoCAD and Who can use it?

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AutoCAD


Maintaining and modifying the complex engineering drawing on paper is very tedious job. AutoCAD is computer software which allows to user to draw and modify 2D and 3D drawing in easy and fast way. The first version of AutoCAD was released in 1982 on Windows operating system. It is maintained and developed by Autodesk. It is available in 14 different languages. User can customize this software according to their project requirements. It is widely used in mechanical, civil, electrical, electronics and communication industries. Autodesk is providing free student version of AutoCAD software for learning purpose. It is a great opportunity for students or learner to have such industry leading software for free!

General features of AutoCAD

AutoCAD is a complex software it has almost every feature for drafting. Out of them some general features are listed below.

  • Draw to scale
  • Smart dimensioning tools
  • Draw in any unit system
  • Infinite drawing area
  • Smart Draw Tools for 2D and 3D drawing
  • Smart Modify Tools
  • Smart Snapping Tools
  • Navigation Tools for 2D and 3D drawings
  • Command line input
  • Dynamic input
  • Export files in most common file formats like .pdf, .jpg, .dwg, .df 

Few vertical programs of AutoCAD for discipline-specific enhancements

Vertical programs are developed by Autodesk for discipline-specific enhancements. They come with discipline-specific tools that makes the software more powerful for that particular field. List of such verticals given below.

  • AutoCAD Advance Steel
  • AutoCAD Architecture
  • AutoCAD Electrical
  • AutoCAD ecscad
  • AutoCAD Map 3D
  • AutoCAD Mech
  • AutoCAD MEP
  • AutoCAD Structural Detailing
  • AutoCAD Utility Design
  • AutoCAD P&ID
  • AutoCAD Plant 3D
  • Autodesk Civil 3D

Variants of AutoCAD

1.AutoCAD LT

  • It comes with reduced capabilities.
  • It is lower- cost version of AutoCAD.
  • It’s first version was released in November 1993.

2.AutoCAD Mobile and AutoCAD Web

  • It Allows users to view, edit, and share AutoCAD files via mobile device and web. 
  • It also comes with limited features.

 3.AutoCAD Student Version

  • It is free available for Students, educators and educational institutions.
  • It is functionally identical to the commercial version but with one exception: DWG files created or edited by a student version have an internal bit-flag set (the "educational flag”) that means you can only use it for educational purpose.

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Student at National Institute of Technology, Patna, Bihar (India).

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