% Jake Bobowski % June 6, 2016 % Created using MATLAB R2014a % Lines in a MATLAB script (*.m file) that begin using the percent symbol % are comments. % It is good practice to thoroughly comment your scripts. % The small initial investment in time to comment your work will same you % large amounts of time in the long run. % You useful command is clearvars. Suppose that you've been running a % bunch of scripts in MATLAB and in that process you've assigned some value % to x, say x = 2. Then you've finished what you wanted to do and you % start a new script that is independent of the ones you've been working on % previously. Suppose also that you now want to use x for something else. % You can clear all previous variable assignments by executing 'clearvars': clearvars % Addition, subtraction, multiplication, and division % If you run a script with a 3+5 statement, the Command Window will produce % an output of 8. 3+5 % You can use a semicolon to suppress the output. This is useful for long % outputs that you don't need to see. To suppress the 8 output from above, % use the input 3+5;. 3+5; % Of course, you can assign the output of an operation to a variable. The % two line below will result in an output of y = 12. x = 3+5; y = 2*x-4 % MATLAB will accept scientific notation as follows: hbar = 1.05e-34; omega = 2*pi*1e9; kB = 1.38e-23; T = 300; hbar*omega/(kB*T) % You can also do powers, roots, and trig functions... 27^3 sqrt(16) sin(pi/2) cos(pi/4) tan(pi/6) log(100) log10(100) exp(1)
ans = 8 y = 12 ans = 1.5936e-04 ans = 19683 ans = 4 ans = 1 ans = 0.7071 ans = 0.5774 ans = 4.6052 ans = 2 ans = 2.7183