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how to graph vector fields containing scalar

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수정 이
수정 이 on 14 Nov 2020
Answered: Monisha Nalluru on 17 Nov 2020
I'm trying to graph some vector fields .
F(x,y,z)-<1,2,z>
F(x,y)=<0.3, -0,4)
my code is look like this
>> [x,y,z]=meshgrid(-2:2,-2:2,-2:2);
>> u=1;
>> v=2;
>> s=z;
>> quiver(x,y,z,u,v,s)
Second one is similar.
>> [x,y,]=meshgrid(-2:2,-2:2);
>> u=0.3;
>> v=-0.4;
>> quiver(x,y, u,v )
I tried to use ones(size(v)) function but it doens't work.
Any help would be helpful. Thank you

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Answers (1)

Monisha Nalluru
Monisha Nalluru on 17 Nov 2020
quiver used to for vector plot
The input arguments X,Y,U,V all should be of same size
In the above problem u,v should be same size of x,y
As an example
[x,y,]=meshgrid(-2:2,-2:2);
u=ones(size(x));
v=ones(size(x)) * 2;
quiver(x,y,u,v)
And inorder to increase the arrow length use scale argument
quiver(x,y,u,v,2) % scale the arrow length to 2 units

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