matlab no1
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This document provides information about a Signals and Systems lab course including grading criteria, lab tasks, and how to access the lab server. It then details the first lab on getting familiar with MATLAB. MATLAB is introduced as a software for matrix computation, visualization, and programming. The MATLAB interface and basics like variables, arithmetic, trigonometric functions, and help commands are explained. Finally, example tasks are provided to practice verifying formulas and using functions like ceil and floor.
matlab no1
- 1. Signals and Systems Lab Course Grading Criteria Attendance……….10% Lab Tasks…………..30% Project………………20% Lab exam..………...20% Viva…………………..20% CECOS College of Engineering and IT March – July 2012
- 2. Accessing lab server To download manuals and software from lab server Goto : start >> Run >> write dsp-server CECOS College of Engineering and IT March – July 2012
- 3. Lab No.01 Getting Familiar with MATLAB Designed by : Dawar Awan dawar@cecos.edu.pk CECOS College of Engineering and IT March – July 2012
- 4. MATLAB Software by MathWorks Matrix Laboratory Every thing is treated as matrix Integrates computation, visualization, and programming in an easy-to-use environment A high-level technical computing language and interactive environment for algorithm development, data visualization, data analysis, and numeric computation CECOS College of Engineering and IT March – July 2012
- 5. MATLAB add-on toolboxes provide application specific commands The power lye in rich libraries and toolboxes for almost every field of engineering CECOS College of Engineering and IT March – July 2012
- 6. Starting/Ending MATLAB Double click MATLAB icon to launch MATLAB A command window will appear with the prompt >> you are now in MATLAB To quit from MATLAB write “exit” or “quit” on MATLAB prompt and press enter CECOS College of Engineering and IT March – July 2012
- 7. MATLAB Interface Current directory Command window Workspace Command history CECOS College of Engineering and IT March – July 2012
- 8. Variables User defined variables CECOS College of Engineering and IT (“^” , is used for power) March – July 2012
- 9. Variables Suppressing output (use semi colon at the end of instruction) Value of variable CECOS College of Engineering and IT March – July 2012
- 10. Variables Knowing your active variables >> who Your variables are: ans x y To remove a variable, write clear variablename >> clear x To remove all the variables from workspace, use clear >> clear CECOS College of Engineering and IT March – July 2012
- 11. Variable arithmetic 2+3*4^2 <== exponent has the highest precedence ==> 2 + 3*16 <== then multiplication operator ==> 2 + 48 <== then addition operator ==> 50 CECOS College of Engineering and IT March – July 2012
- 12. Predefined trigonometric functions Function Meaning Example =========================================================== sin sine sin(pi) = 0.0 cos cosine cos(pi) = -1.0 tan tangent tan(pi/4) = 1.0 asin arcsine asin(1)= 1.5708 acos arccosine acos(1)= 0.0 atan arctangent atan(1)= 0.7854 exp exponential exp(1.0) = 2.7183 log natural logarithm log(2.7183) = 1.0 log10 logarithm base 10 log10(100.0) = 2.0 =========================================================== The arguments of trigonometric functions are given in radians CECOS College of Engineering and IT March – July 2012
- 13. Practice Verify that sin2(x)+ cos2(x) = 1 For arbitrary x, the MATLAB code will be: CECOS College of Engineering and IT March – July 2012
- 14. MATLAB Help www.mathworks.com >> help >> help <command name> CECOS College of Engineering and IT March – July 2012
- 15. Tasks 1. Write a MATLAB code to verify the formula a2-b2 = (a+b)(a-b) 2. What is the function of the commands, ceil and floor ? Use MATLAB help to learn these commands and then apply them to a constant of 4.5 3. Use MATLAB to find the area of a circle whose radius is 4 CECOS College of Engineering and IT March – July 2012