No Arrows showing in plot When using quiver
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I am unable to getting the arrows in the plot by using the quiver. Plot shows all the calculated data tip values but not showing the arrows.
Code as given below. Please help me for this problem.
[X,Y]=meshgrid(-2.5:0.1:2.5,-2.5:0.1:2.5);
Ur=(1+((Y-X)/2.5)-((X*Y)/(2.5^2)));
for i=1:size(X,1)
for j=1:size(X,2)
Uz1(i,j)=(3-(3.75/X(i,j)));
end
end
figure(1)
q=quiver(X,Y,Ur,Uz1,'ShowArrowHead','on','LineWidth',1,'MarkerSize',3);
q.Color = 'red';
q.AutoScaleFactor='1';
采纳的回答
[X,Y]=meshgrid(linspace(-2.5,2.5,10));
Ur=1+((Y-X)/2.5)-((X.*Y)/2.5^2);
for i=1:size(X,1)
for j=1:size(X,1)
Uz1(i,j)=(3-(3.75/X(i,j)));
end
end
figure(1)
q=quiver(X,Y,Ur,Uz1,'LineWidth',1);
q.Color = 'red';
If you use autoscale factor along with arrowhead on it will distort the quiver diagram and misintrepret the plot.
7 个评论
ASHISH CHAUDHARI
2022-11-9
The problem that quiver function may have is that when you specify an interval width(closely spaced)for an X or Y range , the resulting values produced by expressions for U or V may not appear due to grid mismatch and quiver plots are usually vectors with a specific direction. Its safer if you use default intervals produced by functions such as linspace or directly by a : operator available in Matlab.
If it solved your problem please accept the answer :)
ASHISH CHAUDHARI
2022-11-9
[X,Y]=meshgrid(-5:0.1:5,0:0.1:5);
U = sin(Y);
V = cos(X); %e.g from doc ref page
quiver(X,Y,U,V)
ASHISH CHAUDHARI
2022-11-12
ASHISH CHAUDHARI
2022-11-14
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