ex4_15.m

源代码集合

theta = 0: 0.1 : 6*pi;  r = cos(theta/3)+1/9;
subplot(2,2,1), polar(theta, r);
subplot(2,2,2); plot(theta, r);
subplot(2,2,3); semilogx(theta, r); grid
subplot(2,2,4); semilogy(theta, r), grid