t=linspace(0,1,0.01);
x=[5 5 5 6.2 6.7 7.6 9.0 9.0 9.0];
y=[0.3 0.3 0.3 0.6 1.0 1.3 1.5 1.5 1.5];
z=[2 2 2 3 4.5 5.6 5.9 5.9 5.9];
for i=1:6
X(i)=1/6.*(-t.^3+3*t.^2-3*t+1)*x(i)+(3*t.^3-6*t.^2+4)*x(i+1)+(-
3*t.^3+3*t.^2+3*t+1)*x(i+2)+t.^2*x(i+3);
Y(i)=1/6.*(-t.^3+3*t.^2-3*t+1)*y(i)+(3*t.^3-6*t.^2+4)*y(i+1)+(-
3*t.^3+3*t.^2+3*t+1)*y(i+2)+t.^2*y(i+3);
Z(i)=1/6.*(-t.^3+3*t.^2-3*t+1)*z(i)+(3*t.^3-6*t.^2+4)*z(i+1)+(-
3*t.^3+3*t.^2+3*t+1)*z(i+2)+t.^2*z(i+3);
end
plot3(X,Y,Z);
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