how to graph vector fields containing scalar

조회 수: 1 (최근 30일)
수정 이
수정 이 2020년 11월 14일
답변: Monisha Nalluru 2020년 11월 17일
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

답변 (1개)

Monisha Nalluru
Monisha Nalluru 2020년 11월 17일
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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