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x1=[3,5.05,6.7,8.8,10.1,11.8,14.33,16.64,17.7,20,21.5,24.8,26.8,28.3,30.8,32.7,35.1,36.8,39.7,41.3,43.4,45,49.1,50.9,54.1,56.5,58.8,60.9,64.1,64.9,67.5,70,72.5,74.5,76.8,80,81.8,84.9,87.1,90,92]';
x2=[3,5.05,6.7,8.8,10.1,11.8,14.33,16.64,17.7,20,21.5,24.8,26.8,28.3,30.8,32.7,35.1,36.8,39.7,41.3,43.4,45,49.1,50.9,54.1,56.5,58.8,60.9,64.1,64.9,67.5,70,72.5,74.5,76.8,80,81.8,84.9,87.1,90,92]';
x3=[3,5.05,6.7,8.8,10.1,11.8,14.33,16.64,17.7,20,21.5,24.8,26.8,28.3,30.8,32.7,35.1,36.8,39.7,41.3,43.4,45,49.1,50.9,54.1,56.5,58.8,60.9,64.1,64.9,67.5,70,72.5,74.5,76.8,80,81.8,84.9,87.1,90,92]';
x4=[3,5.05,6.7,8.8,10.1,11.8,14.33,16.64,17.7,20,21.5,24.8,26.8,28.3,30.8,32.7,35.1,36.8,39.7,41.3,43.4,45,49.1,50.9,54.1,56.5,58.8,60.9,64.1,64.9,67.5,70,72.5,74.5,76.8,80,81.8,84.9,87.1,90,92]';
y1=y2=y3=y4=[5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5]';
z1=[20.81,20.48,20.53,20.3,19.8,19.2,18.95,18.82,18.68,17.99,15.75,14.81,12.5,11.88,10.57,10.22,9.88,9.43,8.88,8.3,7.77,7.48,7.29,7.02,6.85,6.77,6.54,6.01,5.88,5.68,5.55,5.41,5.38,5.21,5.12,4.8,4.64,4.52,4.44,4.31,4.28]';
z2=[20.91,20.88,20.71,20.4,19.67,19.4,18.8,18.6,18.1,17.7,15.81,14.77,12.76,11.57,10.9,10.17,9.81,9.33,8.2,8.12,7.56,7.44,7.19,7,6.34,6.67,6.12,6,5.95,5.55,5.31,5.41,5.49,5.14,5.09,4.68,4.53,4.42,4.34,4.29,4.21]';
z3=[20.1,20,19.8,19.4,19.1,18.8,18.4,18.29,18.05,17.11,15.61,14.75,12.1,10.95,10.4,10.08,9.52,9.12,8.02,8.3,7.3,7.42,7.25,6.88,6.78,6.66,6.38,5.91,5.71,5.59,5.31,5.27,5.2,5.12,5.01,4.72,4.48,4.49,4.39,4.27,4.19]';
z4=[19.8,20.1,19.5,19.9,19.4,18.8,18.91,18.79,18.09,17.89,15.1,14.12,11.9,10.9,10.1,10.02,9.66,9.03,8.11,7.98,7.65,7.38,7.09,6.91,6.77,6.61,6.11,5.88,5.7,5.48,5.25,5.19,5.28,4.98,4.88,4.61,4.49,4.32,4.25,4.22,4.07]';
x=[x1;x2;x3];y=[y1;y2;y3];z=[z1;z2;z3];
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>> x=x1';
>> x2=x2';
>> x3=x3';
>> x=[x1;x2;x3];
>> y1=y1';
>> y2=y2';
>> y3=y3';
>> z1=z1';
>> z2=z2';
>> z3=z3';
>> z4=z4';
>> y=[y1;y2;y3];
>> z=[z1;z2;z3];
>> surf(x,y,z)
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