目录
【一维插值】interp1 ..................................................................................................................................... 1
yi = interp1(x,y,xi,method) ..................................................................................................................... 1
例 1 ......................................................................................................................................................... 1
例 2 ......................................................................................................................................................... 2
【二维插值】interp2 ..................................................................................................................................... 4
ZI = interp2(X,Y,Z,XI,YI,method) ......................................................................................................... 4
插值方式比较示例 ................................................................................................................................ 4
例 3 ......................................................................................................................................................... 8
例 4 ......................................................................................................................................................... 9
【三角测量和分散数据插值】 ...................................................................................................................13
【数据拟合】 ...............................................................................................................................................17
例 5 ........................................................................................................................................................17
例 6 ........................................................................................................................................................18
【一维插值】interp1
yi = interp1(x,y,xi,method)
例 1
在 1-12 的 11 小时内,每隔 1 小时测量一次温度,测得的温度依次为:5,8,9,15,25,29,31,
30,22,25,27,24。试估计每隔 1/10 小时的温度值。
建立 M 文件 temp.m
hours=1:12;
temps=[5 8 9 15 25 29 31 30 22 25 27 24];
h=1:0.1:12;
t=interp1(hours,temps,h,'spline');
plot(hours,temps,'kp',h,t,'b');
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