How does matlab go about drawing an image like the one below？

Hi all,

I recently wanted to draw a graphic (below, this is a simple example I drew using PPT):

It consists of a black dot and two red arrows.

I now have a set of data about the position of the black points and the red vector (with each black point as the coordinate origin), how do I plot an image like the one above using matlab? Does anyone have any suggestions? Thanks in advance.

Additions:

The data is in the form of a black point at [xx,yy] and a red vector (arrow) at [a,b] (starting at the black point where the red arrow is).

Answer 1

[Chunru]

%       x   y   ux1   uy1   ux2   uy2
data = [1   2   0.1  -0.3   1     1;
        5   3   1    2      -1    -1
        2   5   -1   -2     -0.5  0]   ;

figure; hold on;

s = 0.3;        % control the length of arrow
quiver(data(:,1), data(:,2), data(:,3), data(:,4), s, 'r-');
quiver(data(:,1), data(:,2), data(:,5), data(:,6), s, 'r-');
plot(data(:,1), data(:,2), 'bo', 'MarkerFaceColor', 'b');
axis equal