MATLAB--计算国土面积(5)

MATLAB--计算国土面积 数值分析 课程设计 历时两周 完美通过!!

y5i=interp1(x5,y5,x5i);

plot(x5,y5,'go',x5i,y5i,'g-')

hold on;

x6=[542 555];

y6=[114 95];

x6i=542:1:555;

y6i=interp1(x6,y6,x6i);

plot(x6,y6,'yo',x6i,y6i,'y-')

hold on;

%以上是上边疆的图形

x1=[17 18 20 31 41 58 66 72 ];

y1=[299 298 288 273 262 254 234 220 ];

h=1;

x1i=17:h:72;

y1i=interp1(x1,y1,x1i,'spline');

s1=trapz(y1i)*h

x2=[57 60 71 104 130 146 160 163 168 179 196 223 258 282 307 315 330 352 377 ]; y2=[175 166 160 150 137 121 117 106 83 64 63 56 50 52 46 38 32 21 21 ]; x2i=57:h:377;

y2i=interp1(x2,y2,x2i,'spline');