实验6 Matlab数值计算(4)

实验6 Matlab数值计算

8.1855 8.2464 8.3068 8.3668 8.4263 8.4854

Columns 73 through 78

8.5441 8.6024 8.6603 8.7178 8.7749 8.8317

Columns 79 through 84

8.8881 8.9442 9.0000 9.0555 9.1107 9.1655

Columns 85 through 90

9.2201 9.2744 9.3284 9.3821 9.4354 9.4884

Columns 91 through 96

9.5412 9.5935 9.6456 9.6973 9.7486 9.7996

Columns 97 through 100

9.8502 9.9005 9.9505 10.0000

3.

使用三次样条插值分别求出该日室内外6：30-17：30之间每隔2h各点的近似温度，并绘制插值后的温度曲线。 x=[6:2:18]

yn=[18,20,22,25,30,28,24]; yw=[15,19,24,28,34,32,30]; x1=[6.5:2:17.5];

y1n=interp1(x,yn,x1,'spline'); y1w=interp1(x,yw,x1,'spline'); y1n y1w

某气象观测站测得某日6：00-18：00之间每隔2h的室内外温度（°C）如下表所示。

xx=[x,x1]; yyn=[yn,y1n]; yyw=[yw,y1w]; plot(xx,yyn); plot(xx,yyw); y1n =

18.5020 20.4986 22.5193 26.3775 30.2051 26.8178 y1w =