Examples: MATLAB programming - Script Files -In this example, we are going to program the plotting of two concentric circles and mark the center point with a black square. We use polar coordinates in this case (for a variation). We can open a new edit window and type the following program (script). As already mentioned, lines starting with a '%' sign are comments, and are ignored by MATLAB but are very useful to the viewer. % The initial instructions clear the screen, all % of the variables, and close any figure clc; clear; close all % CIRCLE - A script file to draw a pretty circle % We first generate a 90-element vector to be used as an angle angle = linspace(0, 2*pi, 90); % Then, we create another 90-element vector containing only value 2 r2 = linspace(2, 2, 90); % Next, we plot a red circle using the 'polar' function polar(angle, r2, 'ro') title('One more Circle') % We avoid deletion of the figure hold on % Now, we create another 90-element vector for radius 1 r1 = linspace(1, 1, 90); polar(angle, r1, 'bx') % Finaly, we mark the center with a black square polar(0, 0, 'ks') We save the script and run it with the 'run' icon (within the Editor):  Or we can run it from the Command Window by typing the name of the script. We now get:  From 'Matlab Programming' to home From 'Matlab Programming' to 'Matlab Examples'
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