ENEE222 Elements of Discrete Signal Analysis Lab 3 1

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

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

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

Problem 3 – Mandelbrot Fractal 5

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, -0.0919, ...} c = j, {|zn|} = {0, j, -1 + j, -j, -1 + j, ...} Im Re 6

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

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