Page 65 - MATLAB an introduction with applications

50 ——— MATLAB: An Introduction with Applications

Solution:
(a) t = linspace(0,2*pi,200);
r = sqrt(abs(5*cos(3*t)));
polar(t,r)
90 2.5
120 60
2
1.5
150
1 30
0.5
180 0

210 330

240 300
270
Fig. E1.10(a)

(b) t=linspace(0, 2*pi, 200);
r=sqrt(abs(5*cos(3*t)));
x=r*cos(t);
y=r*sin(t);
fill(x, y, ‘k’),
axis(‘square’)

2

1.5
1
0.5

0

–0.5
–1
–1.5

–2
–3 –2 –1 0 1 2 3
Fig. E1.10(b)

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