double the number of coordinates of a vector while maintaining the trend of the line created with that coordinates

HI! Is there a way to double the number of coordinates while maintaining that trend?

load L
figure
plot3(L(:,1),L(:,2),L(:,3),'k.','Markersize',10);
axis equal

Answer 1

[Voss]

load L
figure('Position',[200 10 400 1000])
plot3(L(:,1),L(:,2),L(:,3),'ko','Markersize',6);
axis equal

Nt = size(L,1);
t = 1:Nt;
t_new = linspace(1,Nt,2*Nt-1);
L_new = interp1(t,L,t_new);

hold on
plot3(L_new(:,1),L_new(:,2),L_new(:,3),'r.','Markersize',4);
legend({'original','interpolated'},'Location','NorthOutside')