how can I give arrow to a particular color in MATLAB?

I have this image

I want to plot the arrow with the color bar, let suppose there is blue colour only so that denote this blue color by an up arrow at a particular direction.

like this, can I do this in matlab?

Answer 1

[Image Analyst]

Did you try annotation?

figure
plot(1:10)
x = [0.3 0.5];
y = [0.6 0.5];
annotation('textarrow',x,y,'String','y = x ', 'Color', 'b', 'LineWidth', 3)

[SAHIL SAHOO]

I think you didn't get my point, maybe because my question wasn't clear

how can I attain this?

[Image Analyst]

It's the figure that's not clear. Too tiny to resolve. Plus, this is a different picture than the original.

If annotation doesn't do it then perhaps quiver will.

[SAHIL SAHOO]

how can i add quiver in this any idea?

[Image Analyst]

I assume you have the coordinates of the spots on the circle perimeter. That can be where the tails of hte arrow are. Then you need to give coordinates of the arrow head. Then pass in all the coordinates in to quiver. quiver undoubtedly has sample code.

[SAHIL SAHOO]

can you please give me some documentation regarding to this?

[Image Analyst]

help quiver

 QUIVER Quiver plot.
    QUIVER(X,Y,U,V) plots velocity vectors as arrows with components (u,v)
    at the points (x,y).  The matrices X,Y,U,V must all be the same size
    and contain corresponding position and velocity components (X and Y
    can also be vectors to specify a uniform grid).  QUIVER automatically
    scales the arrows to fit within the grid.
 
    QUIVER(U,V) plots velocity vectors at equally spaced points in
    the x-y plane.
 
    QUIVER(U,V,S) or QUIVER(X,Y,U,V,S) automatically scales the
    arrows to fit within the grid and then stretches them by S.  Use
    S=0 or S='off' to plot the arrows without the automatic scaling.
 
    QUIVER(...,LINESPEC) uses the plot linestyle specified for
    the velocity vectors.  Any marker in LINESPEC is drawn at the base
    instead of an arrow on the tip.  Use a marker of '.' to specify
    no marker at all.  See PLOT for other possibilities.
 
    QUIVER(...,'filled') fills any markers specified.
 
    QUIVER(AX,...) plots into AX instead of GCA.
 
    H = QUIVER(...) returns a quivergroup handle.
 
    Example:
       [x,y] = meshgrid(-2:.2:2,-1:.15:1);
       z = x .* exp(-x.^2 - y.^2); [px,py] = gradient(z,.2,.15);
       contour(x,y,z), hold on
       quiver(x,y,px,py), hold off, axis image
 
    See also FEATHER, QUIVER3, PLOT.

    Documentation for quiver
       doc quiver