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t=1/30:1/30:14/30; s=[11.86 15.67 20.60 26.69 33.71 41.93 51.13 61.49 72.90 85.44 99.08 113.77 129.54 146.48]; T=[ones(14,1) t' (t.^2)']; [b,bint,r,rint,stats]=regress(s',T); b,stats

X=[598.00 349.00 461.00 57482.00 20729.00 44.00 586.00 455.00 475.00 58796.00 21364.00 89.00 707.00 520.00 491.00 60266.00 21832.00 97.00 737.00 558.00 529.00

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

x1=[1000 600 1200 500 300 400 1300 1100 1300 300]; x2=[5 7 6 6 8 7 5 4 3 9]; y=[100 75 80 70 50 65 90 100 110 60]'; x=[x1' x2']; rstool(x,y,'purequadratic')

x1=[1000 600 1200 500 300 400 1300 1100 1300 300]; x2=[5 7 6 6 8 7 5 4 3 9]; y=[100 75 80 70 50 65 90 100 110 60]'; X=[ones(10,1) x1' x2' (x1.^2)' (x2.^2)']; [b,bint,r,rint,stats]=regress(y,X);

t=1/30:1/30:14/30; s=[11.86 15.67 20.60 26.69 33.71 41.93 51.13 61.49 72.90 85.44 99.08 113.77 129.54 146.48]; [p,S]=polyfit(t,s,2) Y=polyconf(p,t,S) plot(t,s,'k+',t,Y,'r')

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

x1=[7 1 11 11 7 11 3 1 2 21 1 11 10]'; x2=[26 29 56 31 52 55 71 31 54 47 40 66 68]'; x3=[6 15 8 8 6 9 17 22 18 4 23 9 8]'; x4=[60 52 20 47 33 22 6 44 22 26 34 12 12]'; y=[78.5 74.3 104.3 87.6 95.9

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

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);