1. ENEE222 Elements of
Discrete Signal Analysis
Lab 3 1

2. Prepare your working environment
Download the script for lab 2 from ELMS or:
terpconnect.umd.edu/~rssaketh/ene222/lab
Move files to your desktop
Double click the MATLAB icon on the desktop
In MATLAB, set “Current Folder” to your desktop
Double click the file “lab_03_script.txt” inside MATLAB 2

3. Problem 1 – For Loop FOR loop in Matlab:
Question: Will i always have ubound as its last value?
Why or why not?
for i=lbound:step:ubound
statement
end 3

4. Problem 2 – M-file revisit
A script file is a collection of MATLAB commands, saved
with the .M extension:
SCRIPT_FILE.M
To execute these commands, make sure the file is in the
working MATLAB directory, and simply type:
SCRIPT_FILE
in the command window. 4

5. Problem 3 – Mandelbrot Fractal5

6. Problem 3 – Mandelbrot fractal
All points (c=x+j*y) which fulfill
where zn is iteratively obtained by
Examples:
c = 0, {|zn|} = {0,0,0, …}
c = −0.1, {|zn|} = {0, -0.1, -0.09, , ...}
c = j, {|zn|} = {0, j, -1 + j, -j, -1 + j, ...} Im Re 6

7. Problem 4 – while loop WHILE loop in Matlab: # of iterations
while (condition_to_continue)
statement
end
# of iterations
Early termination
FOR
Known
Indirect
(BREAK statement)
WHILE
Need not to be known
Straightforward 7

8. continuFlag = ~termFlag
Problem 4 – Early termination
WHILE v.s. FOR:
for i=lbound:step:ubound
statement
if (termFlag)
break
end
while (continuFlag)
statement
end
Note that continuFlag is the logical complement of termFlag, i.e.,
continuFlag = ~termFlag 8