How can i express many bezier curve in one figure?

I have function of bezier curve, like this

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function P=BezierCurve(CV,nPoints)

nCV=size(CV,1)

n=nCV-1;

u=linspace(0,1,nPoints)';

B=zeros(length(u),nCV);

U=zeros(length(u),nCV);

for i=0:n

    B(:,i+1)=factorial(n)/(factorial(i)*factorial(n-i));

    U(:,i+1)=u.^i.*(1-u).^(n-i);

end

P=B.*U*CV;

close all

CV=[0 0 0;

    1  0 0;

    1  1 0;

    5 10 0]

CV2=[1 1 1;

    3  0 1;

    4  1 2;

    8 10 9]

CV3=[0 100 0;

    3  0 1;

    4  1 2;

    8 10 9]


nPoints=100;

P=BezierCurve(CV, nPoints);

figure;hold on; grid on;

% plot Bezier Curve

plot3(P(:,1), P(:,2), P(:,3),'k')

% plot Control Vertices

plot3(CV(:,1), CV(:,2), CV(:,3),'r:o')

nPoints=100;

P=BezierCurve(CV2, nPoints);

figure;hold on; grid on;

% plot Bezier Curve

plot3(P(:,1), P(:,2), P(:,3),'k')

% plot Control Vertices

plot3(CV2(:,1), CV2(:,2), CV2(:,3),'r:o')

nPoints=100;

P=BezierCurve(CV3, nPoints);

figure;hold on; grid on;

% plot Bezier Curve

plot3(P(:,1), P(:,2), P(:,3),'k')

% plot Control Vertices

plot3(CV3(:,1), CV3(:,2), CV3(:,3),'r:o')

If i execute this, is is expressed in three figures, not in one figure.

what do i need to fix to represent multipole lines in a single figure?

Answer 1

[Geoff Hayes]

Jin - you call

figure;hold on; grid on;

three times and so create three figures. If you just want all the plots on a single figure, then keep the first line that does the above, and remove the last two.