Page 77 - MATLAB an introduction with applications
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62 ——— MATLAB: An Introduction with Applications
>> [x,y]=meshgrid(x,y);
>> z=2.0^(–1.5*sqrt(x^2+y^2))*cos(0.5*y)*sin(x);
>> contour3(x,y,z,15)
>> xlabel(‘x’);ylabel(‘y’)
>> zlabel(‘z’)
0.5
z 0
–0.5
4
2
0 2
–2 –2 0
–4 –4
y x
Fig. E1.15 (c)
(d) % 2-D Contour Plot
>> x=–4.0:0.25:4;
>> y=–4.0:0.25:4;
>> [x,y]=meshgrid(x,y);
>> z=2.0^(–1.5 * sqrt(x^2+y^2)) * cos(0.5 * y) * sin(x);
>> contour(x,y,z,15)
>> xlabel(‘x’);ylabel(‘y’)
>> zlabel(‘z’)
4
2
y 0
–2
–4
–4 –3 –2 –1 0 1 2 3
Fig. E1.15 (d)
F:\Final Book\Sanjay\IIIrd Printout\Dt. 10-03-09
