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Looking to flip plot

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Ethan Rando
Ethan Rando 2020-11-17
回答： Adam Danz 2020-11-17
Hello I am looking to make this plot accurate. For some reason it is spiraling clockwise when it should be spiraling counter clockwise with the same shape. Any help with this would be great.
It is basically flipped on both the x and y-axis from how it should be.
[x, y] = meshgrid(-2.5:.5:2.5, -2.5:.5:2.5);
xdot = (-1*x) + (2*y);
ydot = (-1*x) + (-3*y);
figure(1)
streamslice(x,y, xdot, ydot, 'black')
grid on
xlabel('X');
ylabel('Y');
title('#2');

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回答（1 个）

Adam Danz
Adam Danz 2020-11-17
Ran in:
Flip the xdot, ydot vectors and their sign
[x, y] = meshgrid(-2.5:.5:2.5, -2.5:.5:2.5);
xdot = (-1*x) + (2*y);
ydot = (-1*x) + (-3*y);
xdot = -fliplr(xdot); % <----
ydot = -flipud(ydot); % <----
figure(1)
streamslice(x,y, xdot, ydot, 'black')
grid on
xlabel('X');
ylabel('Y');
title('#2');
axis tight

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