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1、5、風(fēng)絨J生作插值計算：一維插值函數(shù):yi=interpl(x,y,xi，'method1xi處的插值hours二1:12;temps=[589152529313022252724];h=l:0.1:12;t=interpl(hours,temps,h/spline1);(直接輸出數(shù)據(jù)將是很多的)plot(hours，temps，’+’，h，t，hours，temps，Y:’)%作圖xlabel(’Hour’)，ylabel(’DegreesCelsius’)x0=[035791112131415];y0=[01.21.72.02.12.01.81.21.01.6];x=0:0.1:15;yl
2、=interpl(xO,yO,x);%直線插值y2=interpl(xO,yO,x,'spline');%三次樣條插值subplot(2,1,1)plot(xO,yO,’k+’，x,yl,1r1)gridtitle(1piecewiselinear1)subplot(2,1,2)plot(xO,yO,
3、k+*,x,y2,，r，)gridtitle(1spline1)z=interp2(xO,yOzzO,xzy,fmethod7)x=l:5;y=l:3;temps=[8281808284;7963616581;8484828586];figure;mesh(x,y,temps);holdonxi
4、=l:0.2:5;yi=l:0.2:3;zi=interp2(x,y,temps,xi■,yi,?cubic1);figure;mesh(xi,yi,zi)holdonx=[12001600200024002800320036004000];y=[1200160020002400280032003600];z=[11301250128012301040900500700132014501420140013007009008501390150015001400900110010609501500120011001350145012001150101015001200110015501600155
5、013801070150015501600155016001600160015501480150015501510143013001200980];figure⑴；meshz(x,y,z)xlabel('X*)ylabel('Y*)zlabel()xi=0:50:5600;yi=O:50:4800;figure(2)zli=interp2(x,y,z,xi,yi'z*nearest1);%臨近插值?surfc(xi,yi,zli)xlabel(1X’)，ylabel(1Y’)，zlabel(*Z')%雙直線插值(代碼省略了)figure(3)z2i=interp2(x,y,z,xi,yi■〉；
6、surfc(xi,yi,z2i)xlabel(1X'),ylabel(1Y'),zlabel('Z1)figure(4)z3i=interp2(x,y,z,xi,yi?cubic');%雙三次插值surfc(xi,yi,z3i)xlabel(*X’)，ylabel(*Y*),zlabel(*Z*)figure(5)subplot(1,3,1),contour(xi,yi,zli,10,1r1);subplot(1,3,2),contour(xi,yi,z2i,10,1r1);subplot(1,3,3),contour(xi,yi,z3i,10,1r1);x=[129140103.58818
7、5.5195105.5157.5107.57781162162117.5]y=[7.5141.52314722.5137.585.5-6.5-81356.5-66.584-33.5];z=[-4-8-6-8-6-8-8-9-9-8-8-9-4-9];cx=75:0.5:200;cy=-50:0.5:150;cz=griddata(x,y,z,ex,cy丨，丨cubic1);meshz(ex,cy,cz),rotate3dxlabel(1X'),ylabel(1Y'),zlabel('Z1)figure(2),contour(ex,cy,cz,[-5-5]);gridholdonplot(x,y
8、,'+?)xlabel(’X’),ylabel(’Y1)colormapgray圖片灰色化
