How can I plot a picture instead of "linespec" requirements?

For example,

instead of just running this code:

plot(x,y,'o');

with a plot of blue circles, I want to plot a picture of choice. I know how convert an image from a url with urlwrite command..Can I just put that as the 3rd parameter, or is there another line of code I need to do this? Thanks!

this is my entire code:

while true

 dlg_prompts = {'Radius','delta_time','delta_theta'};
 dlg_title = 'Calculate a Mass Moment of Inertia';
 dlg_defaults = {'1','.01','3'};
 opts.Resize = 'on';  % a structure
 dlg_ans = inputdlg(dlg_prompts,dlg_title,1,dlg_defaults,opts)
 r1 = str2num(dlg_ans{1})
 dtime=str2num(dlg_ans{2})
 dtheta=str2num(dlg_ans{3}')

axis([-2.*r1 2.*r1 -2.*r1 2.*r1])

title('Simulating Your Rotation')

hold on

 for dtheta = [0:dtheta:360];

x = r1.*cosd(dtheta);

y=r1.*sind(dtheta);

%**url='http://www.girl.com.au/image.phpimagename=ballerinawiigame.jpg&imagetype=b';

%**img = imread(url);

%**plot(x,y,img) **NOT THE RIGHT COMMAND

pause(dtime)

 end

quest = 'Would you like to go again?';

qtitle = 'Continue?';

a = { 'Absolutely', 'No Way!'};

resp = questdlg(quest,qtitle,a{1},a{2},a{1});

if resp == a{2}

    h=msgbox(sprintf('Thanks for your time on this A++ Project!'));

    waitfor(h);

    break
end

end

Answer 1

[Henrik]

If you want to plot a picture, then maybe surf or imagesc is the right command.

EDIT:

What is it exactly you want? Do you want the image to be used as a marker instead of circles? If so, then maybe this can help:

http://www.mathworks.com/matlabcentral/fileexchange/39487-custom-marker-plot

I found it by googling "matlab custom marker" - there seems to be more results that might be useful if this is indeed what you want.