Basic Matlab operators and simple program to work in Matlab.

1. Basic Operators in Matlab
Rishi PL
Department of Electronic and
Communication Engineering,
Shyamsundar PL
Department of Control System
Engineering

2. Operators in Matlab
● There are basic three operators in Matlab they are
● Arithmetic Operator
● Relational Operator
● Logical Operator

3. Arithmetic Operator
Operator Symbol
Unary Addition +
Binary Addition +
Unary Subtraction -
Binary Subtraction -
Matrix Multiplication *
Element Wise-Multiplication .*
Matrix division /
Element Wise- Division ./

4. Arithmetic Operator Matlab Code
4+2= +6
Matlab code: Matlab code: Matlab code:
>>4+2 >>4-2 >>4*2
>>6 >>2 >>8
Binary Operator Unary Operator

5. Creating the Matrix & Multiplication
In MATLAB, you create a matrix by entering elements in each row as comma or space
delimited numbers and using semicolons to mark the end of each row.
Matlab code for Matrix Creation
a = [ 1 1 1; 2 2 2;] Matlab code for multiplication
a = 1 1 1 a = [ 1 1 1; 2 2 2;] ;
2 2 2 b= [ 1 1 1; 2 2 2;] ;
c=a*b;
disp(c);

6. Element wise Multiplication
● For element-wise multiplication dot(.) operator is used to perform operation.
>> a=5;
>>b=6;
>>c=a.*b;
>>disp(c);

7. Relational Operator
Operator Symbol
Equal to ==
Not equal to ~=
Greater than >
Greater than equal >=
Less than <
Less than equal <=

8. Relational Operator
● Relational operator is used to perform relation of two numerical numbers that
perform some assignment operations.
Creating Unit Impulse signal using relational operator
>>t=-5:1:5;
>>impulse=t==0;
>>plot(t,impulse);

9. Logical Operator
Operator Symbol
AND &
OR |
NOT ~
Short circuited AND &&
Short circuited OR ||

10. Logical Operator
● Logical operator do operation same like AND, OR, NOT gate operations.
Short circuited AND
>>a=5;
>>b=5;
>>c=(a==5)&&(b~=5)
>>False
Short circuited OR
>>a=5;
>>b=5;
>>c=(a==5)||(b~=5)
>>True
In short circuit AND produces 0*1 = FALSE, 1*1 = TRUE (same like AND operation)
In short circuit OR produces 0+1= TRUE also 1+1 = TRUE (same like OR operation)

11. Basic program of multiplication of two signals
● Multiplication of decaying exponential and sine-signal using matlabclear all;
close all;
t=0:0.01:100;
a=exp(-2*t);
b=cos(2*3.14*1*t);
c=a.*b;
subplot(3,1,1)
plot(t,a);
title('decaying exponential');
xlabel('time');
ylabel('amplitude');
subplot(3,1,2)
plot(t,b);
title('sine singnal');
xlabel('time');
ylabel('amplitude');
subplot(3,1,3)
plot(t,c);
title('Multiplication of two signal');
xlabel('time');
ylabel('amplitude');

12. Multiplication of decaying exponential and sine-signal

13. THANK YOU