select and extract only some coordinates of a 3D object

I have the following .txt file (Rx3 matrix).

rabbit = importdata("rabbit.txt");
figure
plot3(rabbit(:,1), rabbit(:,2), rabbit(:,3),'k.','Markersize',5)
grid off
axis equal
xlabel('x')
ylabel('y')
zlabel('z')

I want to be able to extract only the coordinates of some nodes such as this area:

xlim([-10 -4])
ylim([-6 0])
zlim([11 16])

Could also be useful something like this that I found at the following link.

[Fabio Freschi]

Do you want to use the mouse and click on each point? Or rather you want to extract the subset of nodes in the region you specified?

[Alberto Acri]

I want to extract the subset of nodes in the region you specified

Answer 1

[Fabio Freschi]

Is this what you are asking?

% your code
rabbit = importdata("rabbit.txt");
figure
plot3(rabbit(:,1), rabbit(:,2), rabbit(:,3),'k.','Markersize',5)
grid off
axis equal
xlabel('x')
ylabel('y')
zlabel('z')

% range
xRange = [-10 -4];
yRange = [-6 0];
zRange = [11 16];

% indices of points in the range
idx = rabbit(:,1) >= xRange(1) & rabbit(:,1) <= xRange(2) & ...
    rabbit(:,2) >= yRange(1) & rabbit(:,2) <= yRange(2) & ...
    rabbit(:,3) >= zRange(1) & rabbit(:,3) <= zRange(2);

% plot in red
hold on
plot3(rabbit(idx,1), rabbit(idx,2), rabbit(idx,3),'ro','Markersize',5)

[Alberto Acri]

Yes exactly. However, can you tell me how to save the coordinates you selected in red in an array?

[Fabio Freschi]

Sure! Simply get the coordinates that were plotted

rabbithead = [rabbit(idx,1), rabbit(idx,2), rabbit(idx,3)];