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x = [[1 2 3 4]’ [2 3 4 5]’ [3 4 5 6]’]x =1 2 32 3 43 4 54 5 6>> plot(x,q)>> grid4.4 Clearing the Figure WindowYou can clear the plot window by typing clf, which st<strong>and</strong>s for ‘clearfigure’. To get rid <strong>of</strong> a figure window entirely, type close. To get rid<strong>of</strong> all the figure windows, type close all. New figure windows can becreated by typing figure.4.5 SubplotsTo plot more than one set <strong>of</strong> axes in the same window, use the subplotcomm<strong>and</strong>. You can typesubplot(m,n,p)to break up the plotting window into m plots in the vertical direction<strong>and</strong> n plots in the horizontal direction, choosing the pth plot for drawinginto. The subplots are counted as you read text: left to right along thetop row, then left to right along the second row, <strong>and</strong> so on. Here is anexample (do not forget to use the ↑ key to save typing):t = 0:.1:2*pi;subplot(2,2,1)plot(cos(t),sin(t))subplot(2,2,2)plot(cos(t),sin(2*t))subplot(2,2,3)plot(cos(t),sin(3*t))subplot(2,2,4)plot(cos(t),sin(4*t))If you want to clear one <strong>of</strong> the plots in a subplot without affectingthe others you can use the cla (clear axes) comm<strong>and</strong>. Continuing theprevious example:c○ 2000 by CRC Press LLC
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