How to plot a vector field?

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Daniel 2014-11-14

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https://ww2.mathworks.cn/matlabcentral/answers/162686-how-to-plot-a-vector-field

评论： Star Strider 2014-11-14

function xp=Pr(t,x)

xp=x;

x1=x(1);

x2=x(2);

xp(1)=(x1.^2) - 312.*x1 + 6.*x2;

xp(2)=-1/2.*(x1.^2) - x1.*x2 + 292.*x1 + 144.*x2;

I'm trying to plot a vector field for this function using meshgrid and quiver and I don't manage to figure it out. Need help! Thanks!

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Andrew Reibold 2014-11-14

What did you try? Did you read the documentation for meshgrid and quiver?

Also, we can't help you really with such limited information. Does xp just contain two scalar values? I have no idea what is in there because we dont' know what Pr is nor the values of t and x. There is not enough information, and no shown attempt to create a vector field.

It seems you already know which functions to try.