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load xyz
xi=0:50:5600;
yi=0:50:4800;
zi=interp2(x,y,z,xi,yi','nearest');
subplot(1,3,1),contour(xi,yi,zi,10,'r');
hold on
plot(2000,2800,'c.',0,800,'r.',4000,2000,'r.',2000,4000,'r.','MarkerSi
http://www.codebf.com/read/4/64
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load xyz
meshz(x,y,z),rotate3d
xlabel('X'),ylabel('Y'),zlabel('Z')
hold on;
plot3(2000,2800,1100,'c.',0,800,650,'r.',4000,2000,950,'r.',2000,4000,1320,'r.','MarkerSize',30);
http://www.codebf.com/read/4/65
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clear;
x=[129 140 103.5 88 185.5 195 105.5 157.5 107.5 77 81 162 162 117.5];
y=[7.5 141.5 23 147 22.5 137.5 85.5 -6.5 -81 3 56.5 -66.5 84 -33.5];
z=[-4 -8 -6 -8 -6 -8 -8 -9 -9 -8 -8 -9 -4 -9];
http://www.codebf.com/read/4/66
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x0=[0 3 5 7 9 11 12 13 14 15 ];
y0=[0 1.2 1.7 2.0 2.1 2.0 1.8 1.2 1.0 1.6 ];
x=0:0.1:15;
y1=lagr1(x0,y0,x);
y2=interp1(x0,y0,x);
y3=interp1(x0,y0,x,'spline');
subplot(3,1,1)
plot(x0,y0,'k+',x,y
http://www.codebf.com/read/4/68
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x=linspace(-6,6,100);
y=1./(x.^2+1);
x1=linspace(-6,6,41);
y1=1./(x1.^2+1);
plot(x,y,x1,y1,x1,y1,'o','LineWidth',1.5),
gtext('n=40'),
http://www.codebf.com/read/4/69
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http://www.codebf.com/read/4/70
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x=linspace(-6,6,100);
y=1./(x.^2+1);
x1=linspace(-6,6,11);
y1=1./(x1.^2+1);
plot(x,y,x1,y1,x1,y1,'o','LineWidth',1.5),
gtext('n=10'),
http://www.codebf.com/read/4/72
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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,'+',h,t,hours,temps,'r:')
xlabel('Hour'),ylabel('Degrees Celsius')
http://www.codebf.com/read/4/73
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x0=linspace(-5,5,11);
y0=1./(1+x0.^2);
x=linspace(-5,5,100);
y=interp1(x0,y0,x,'spline');
x1=linspace(-5,5,100);
y1=1./(1+x1.^2);
plot(x1,y1,'k',x0,y0,'+',x,y,'r');
http://www.codebf.com/read/4/74
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x=1:5;
y=1:3;
temps=[82 81 80 82 84;79 63 61 65 81;84 84 82 85 86];
mesh(x,y,temps)
pause
xi=1:0.2:5;
yi=1:0.2:3;
zi=interp2(x,y,temps,xi',yi,'cubic');
figure(2)
mesh(xi,yi,zi)
http://www.codebf.com/read/4/75
