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x=2:16; y=[6.42 8.20 9.58 9.5 9.7 10 9.93 9.99 10.49 10.59 10.60 10.80 10.60 10.90 10.76]; beta0=[8 2]'; [beta,r,J]=nlinfit(x',y','volum',beta0); beta

x=[143 145 146 147 149 150 153 154 155 156 157 158 159 160 162 164]'; X=[ones(16,1) x]; Y=[88 85 88 91 92 93 93 95 96 98 97 96 98 99 100 102]'; [b,bint,r,rint,stats]=regress(Y,X); b,bint,stats

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'),

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'),

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)

x=linspace(-6,6,100); y=1./(x.^2+1); x1=linspace(-6,6,5); y1=1./(x1.^2+1); plot(x,y,x1,y1,x1,y1,'o','LineWidth',1.5), gtext('n=4'),

x=linspace(-6,6,100); y=1./(x.^2+1); x1=linspace(-6,6,21); y1=1./(x1.^2+1); plot(x,y,x1,y1,x1,y1,'o','LineWidth',1.5), gtext('n=20'),

x=[1 2 3 4 5 8 7 18] y=1:7 z=3:2:9 v=[y z] u=linspace(2,9,11)

x=1:9 y=x(2:2:8) z=[x(1) x(6) x(8)]

[x,y,z]=dsolve('Dx=2*x-3*y+3*z','Dy=4*x-5*y+3*z','Dz=4*x-4*y+2*z','t'); x=simple(x) y=simple(y) z=simple(z)