**MATLAB **is a very important tool for every engineer but it plays a special role in the life of biomedical engineer so i decided to start up on MATLAB in a totally different fashion

**First Steps in MATLAB**

First of all officially “MATLAB is a software package that lets you do mathematics and computation, analyse data, develop algorithms, do simulation and modelling, and produce graphical displays and graphical user interfaces.”

**GETTING STARTED IN MATLAB**

- To run matlab on a PC double-click on the matlab icon.To run matlab on a unix system, type matlab at the prompt.
- To end a matlab session type quit or exit at the matlab prompt.
- You can type help at the matlab prompt, or pull down the Help
- menu on a PC.When starting matlab you should see a message:
**To get started, type one of these commands: helpwin,**

helpdesk, or demo

**>>**

**NOW HOW TO PERFORM FUNCTIONS IN MATLAB**

**ADDITION:**

for adding two numbers just go to command prompt and

just type 1+1

and press enter you will get the output as 2 ; it is as simple as that.

MATLAB gives output as

ans =

2

This “ans” can be used also as a variable for the further operations.For example you can type

ans*ans

to check that 2 × 2=4

MATLAB has updated the value of ans to be 4.

**Matrices’**

The basic object that MATLAB deals with is a matrix. A matrix is an

array of numbers. For example the following are matrices:

The size of a matrix is the number of rows by the number of columns.

The ?rst matrix is a 3×3 matrix. The (2,3)-element is one million—1e6

stands for 1 × 106—and the (3,2)-element is pi = ? =3.14159 … .

The second matrix is a row-vector, the third matrix is a column-vector

containing the number i, which is a pre-de?ned matlab variable equal

to the square root of ?1. The last matrix is a 1 × 1 matrix, also called

a scalar.

**Variables**

Variables in matlab are named objects that are assigned using the

equals sign = .

They are limited to 31 characters and can contain

upper and lowercase letters, any number of ‘_’ characters, and numerals.

They may not start with a numeral. matlab is case sensitive: A

and a are di?erent variables. The following are valid matlab variable

assignments:

a=1

speed = 1500

name = ’biomedin’

**invalid assignments:**

2for1 = ’yes’

first one = 1

**Please try this article if you like it i will post more**