Umal-qura university

-------------------------TASK 6--------------------------

Create an m‐file that inputs a number from user and then finds out the factorial of that
number.

Lab # 4

OBJECTIVES OF THE LAB
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This lab will help you grasp the following concepts:

• 
  Discrete Signal representation in Matlab
  
• 
  Matlab Graphics
  
• 
  Two Dimensional Plots
  
• 
  Plot and subplot
  
• 
  Different Plotting Functions Used in Matlab
  

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1. DISCRETE-TIME SIGNAL REPRESENTATION IN MATLAB

In MATLAB, finite‐duration sequence (or discrete time signal) is represented by row matrix/vector of appropriate values. Such representation does not have any information about sample position n. Therefore, for correct representation, two vectors are required, one for x and other for n. Consider the following finite duration sequence & its implementation:
x(n) = { 1 ‐1 0 2 1 4 6 }
↑
>> n = [‐3:1:3]
n =
‐3 ‐2 ‐1 0 1 2 3
>> x = [1 ‐1 0 2 1 4 6]
x =
1 ‐1 0 2 1 4 6
NOTE # 01: When the sequence begins at n=0, x‐vector representation alone is enough.


NOTE # 02: An arbitrary infinite‐sequence can’t be represented in MATLAB due to limited memory.
-------------------------TASK 01--------------------------
Given the signals:
x₁[n] = [2 5 8 4 3]
x₂[n] = [4 3 2]

1. 
   Write a Matlab program that adds these two signals. Use vector addition and multiplication.
   
2. 
   Instead of using vector addition and multiplication, use for loop to add and multiply the signals.