select and extract only some coordinates of a 3D object
6 visualizzazioni (ultimi 30 giorni)
Mostra commenti meno recenti
Alberto Acri
il 23 Dic 2022
Commentato: Fabio Freschi
il 23 Dic 2022
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])
2 Commenti
Fabio Freschi
il 23 Dic 2022
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?
Risposta accettata
Fabio Freschi
il 23 Dic 2022
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)
2 Commenti
Fabio Freschi
il 23 Dic 2022
Sure! Simply get the coordinates that were plotted
rabbithead = [rabbit(idx,1), rabbit(idx,2), rabbit(idx,3)];
Più risposte (0)
Vedere anche
Categorie
Scopri di più su Line Plots in Help Center e File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!