close all, clear all, clc
P=[5.000000	-2.000000	9.000000;
2.852476	2.400551	10.425770;
2.443977	7.108458	8.560102;
2.107704	12.195803	8.685630;
1.720847	17.279648	8.806692;
1.327363	22.363383	8.909940];

X=P(:,1)';
Y=P(:,2)';
Z=P(:,3)';

pr=[X;Y;Z];
plot3(X,Y,Z,'o')
grid on


hold on
fnplt(cscvn(pr(:,[1:end])),'r',2)
hold off