Filter löschen
Filter löschen

Plotting zero vectors in quiver3

1 Ansicht (letzte 30 Tage)
David Meixell
David Meixell am 3 Dez. 2020
Kommentiert: KSSV am 3 Dez. 2020
I'm trying to plot the curl of the function v = -y + x + 0. This comes to (0,0,2), but I get an error stating the variables must be the same size, so I suspect the zeros are causing issues. How can I do a quiver3 plot with these numbers?
%% set up mesh
Xvc=(-5:2:5)';
Yvc=(-5:2:5)';
Zvc=(-5:2:5)';
[X,Y,Z]=meshgrid(Xvc, Yvc, Zvc);
%% plot V
Vx=-Y; % Ex 2 Vx from worksheet
Vy=X; % Ex 2 Vy from worksheet
Vz=0; % Ex 2 Vz from worksheet
figure(110)
quiver3(X, Y, Z, Vx, Vy, Vz); %Changed to 2D plot due to lack of Vz values
grid on
xlabel('Vx')
ylabel('Vy')
%% compute curl
Crlx=0; %Curl X from solved worksheet
Crly=0; %Curl Y from solved worksheet
Crlz=2; %Curl Z from solved worksheet
figure(120)
quiver(X, Y, Z, Crlx, Crly, Crlz);
grid on
tmp=0;

Akzeptierte Antwort

KSSV
KSSV am 3 Dez. 2020
Bearbeitet: KSSV am 3 Dez. 2020
%% set up mesh
Xvc=(-5:2:5)';
Yvc=(-5:2:5)';
Zvc=(-5:2:5)';
[X,Y,Z]=meshgrid(Xvc, Yvc, Zvc);
%% plot V
Vx=-Y; % Ex 2 Vx from worksheet
Vy=X; % Ex 2 Vy from worksheet
Vz=zeros(size(X)); % Ex 2 Vz from worksheet
figure
quiver3(X, Y, Z, Vx, Vy, Vz); %Changed to 2D plot due to lack of Vz values
view(3)
grid on
xlabel('Vx')
ylabel('Vy')
  2 Kommentare
David Meixell
David Meixell am 3 Dez. 2020
Ah! So for the second part, if I change it to the following, it should work as well?
%% compute curl
Crlx=zeros(size(X)); %Curl X from solved worksheet = 0
Crly=zeros(size(X)); %Curl Y from solved worksheet = 0
Crlz=2*ones(size(X)); %Curl Z from solved worksheet = 2
KSSV
KSSV am 3 Dez. 2020
Yes it will work.

Melden Sie sich an, um zu kommentieren.

Weitere Antworten (0)

Kategorien

Mehr zu Vector Fields finden Sie in Help Center und File Exchange

Produkte


Version

R2019b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by