quiver

Creates a 2D quiver plot in an axis.

Syntax

h = quiver(u, v)

h = quiver(x, y, u, v)

h = quiver(x, y, u, v, sf)

h = quiver(x, y, u, v, fmt)

h = quiver(hAxes, ...)

Inputs

u, v
Coordinates of vectors.
Type: double | integer
Dimension: vector | matrix
x, y
Coordinates of vector origin.
Type: double | integer
Dimension: vector | matrix
sf
Scaling factor that controls the length of the vectors. The default value is 0.9. If set to 0 the vectors are not scaled.
Type: double
fmt
Formatting string for the vector. It can be any combination of the following strings:
  1. line style: '-', '-.', ':', '--', '-:'.
  2. line color: 'r', 'g', 'b', 'c', 'y', 'm', 'w', 'k'.
  3. marker style: 's', 'o', 'd', 'x', 'v', '^', '+', '*', '.'.
Type: string
hAxes
Axis handle.
Type: double

Outputs

h
Handle of the quiver graphics object.

Examples

Simple quiver plot example: 
clf;
u = linspace(1,3,9);
v = sin(linspace(1, 3, 9));
qh = quiver(0:8, 0:8, u,v);
axis([0 10 0 9]);


Figure 1. Simple quiver plot
quiver plot style: 
clf;
u = linspace(1,3,9);
v = sin(linspace(1, 3, 9));
qh = quiver(0:8, 0:8, u,v);
axis([0 10 0 9]);
set(qh, 'color', 'r')
set(qh, 'linestyle', '--')
set(qh, 'marker', 'o')


Figure 2. quiver plot style
quiver plot with autoscaling disabled: 
clf;
u = linspace(1,3,9);
v = sin(linspace(1, 3, 9));
qh = quiver(0:8, 0:8, u,v);
axis([0 12 0 9]);
set(qh,'autoscale','off');


Figure 3. Vector autoscale 'off'
Scale arrow head: 
clf;
[x, y] = meshgrid(-pi:pi/8:pi, -pi:pi/8:pi);
u = sin(y);
v = cos(x);
qh = quiver(x,y,u,v);
set(qh,'maxheadsize',0.9)


Figure 4. Arrow head size set to 0.9

Comments

If there are no axes, they are created first.