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annotate toolboxes/FullBNT-1.0.7/KPMtools/plot_ellipse.m @ 0:e9a9cd732c1e tip

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first hg version after svn
author wolffd
date Tue, 10 Feb 2015 15:05:51 +0000
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wolffd@0 1 % PLOT_ELLIPSE
wolffd@0 2 % h=plot_ellipse(x,y,theta,a,b)
wolffd@0 3 %
wolffd@0 4 % This routine plots an ellipse with centre (x,y), axis lengths a,b
wolffd@0 5 % with major axis at an angle of theta radians from the horizontal.
wolffd@0 6
wolffd@0 7 %
wolffd@0 8 % Author: P. Fieguth
wolffd@0 9 % Jan. 98
wolffd@0 10 %
wolffd@0 11 %http://ocho.uwaterloo.ca/~pfieguth/Teaching/372/plot_ellipse.m
wolffd@0 12
wolffd@0 13 function h=plot_ellipse(x,y,theta,a,b)
wolffd@0 14
wolffd@0 15 np = 100;
wolffd@0 16 ang = [0:np]*2*pi/np;
wolffd@0 17 R = [cos(theta) -sin(theta); sin(theta) cos(theta)];
wolffd@0 18 pts = [x;y]*ones(size(ang)) + R*[cos(ang)*a; sin(ang)*b];
wolffd@0 19 h=plot( pts(1,:), pts(2,:) );