MATLAB: How to increase Quiver_tri arrow length

quiver_tri function

%QUIVER_TRI(x,y,u,v,headsize,headangle,width,col)

can any body help with insight on how to increase the arrow head using Quiver_tri function.

say, quiver_tri (xx_, yy_, uu15_, vv15_,5,27.5,1,'k');

%quiver_tri(x,y,u,v,headsize,headangle,width,col)

Best Answer

Quiver_tri arrow length

When I tried, the arrow length is adjusted with gird number.

[x,y] = meshgrid(0:0.5:2,0:0.5:2);
u = cos(x).*y;
v = sin(x).*y;
figure
quiver(x,y,u,v)

[x,y] = meshgrid(0:0.2:2,0:0.2:2);
u = cos(x).*y;
v = sin(x).*y;
figure
quiver(x,y,u,v)

Related Solutions

MATLAB: How to define limit of quiver axis

You could use axis function. For more information check here: https://www.mathworks.com/help/matlab/ref/axis.html

See the following example. There ae two subplots, the second one just shows the plot between x = [0 1] and y=[0 1]

[x,y] = meshgrid(0:0.2:2,0:0.2:2);
u = cos(x).*y;
v = sin(x).*y;
figure
subplot(211); quiver(x,y,u,v)
subplot(212); quiver(x,y,u,v); axis([0 1 0 1])

MATLAB: How to change an arrow in a quiver plot

This functionality does not currently exist in "quiver" in MATLAB R2015b, but the same effect can be achieved by creating two separate quiver plots and enforcing equal scales between them.

Turning off the 'AutoScale' property of "quiver" prevents "quiver" from rescaling vectors according to the data. By manually scaling the data, the same scale can be kept between two quiver plots. Refer to the following example which creates a quiver plot of a vector field and colors one of the vectors differently.

stepX = 0.2;
stepY = 0.2;
[x,y] = meshgrid(0:stepX:2,0:stepY:2);
x = x(:);
y = y(:);
u = cos(x).*y;
v = sin(x).*y;
%manually scale u and v
scale = max( stepX/max(u), stepY/max(v) );
u = scale*u;
v = scale*v;
I = 52; %choose an arrow to change
figure
a = quiver(x(I),y(I),u(I),v(I),'AutoScale','off','Color','red','MaxHeadSize',Inf);
%remove point from the data
x(I) = [];
y(I) = [];
u(I) = [];
v(I) = [];
hold on
quiver(x,y,u,v,'AutoScale','off','Color','blue')

Best Answer

Related Solutions

MATLAB: How to define limit of quiver axis

MATLAB: How to change an arrow in a quiver plot

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