direction of quiver arrows

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F46
F46 2020-11-22
评论： F46 2020-11-23
I was using quiver to plot a vector field. The details of the code is not relevant here. As can be seen from the figure the vector [-21,-21] is pointing 45 from the positive horizonta when it should be in the reverse direction. Why?
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Rik
Rik 2020-11-23
Ran in:
I don't see your issue.
quiver(1.5, 1.5, -21, -21),axis([-20 20 -20 20])
F46
F46 2020-11-23
Thanks Rik. I guess I was looking at the wrong vector

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