Scatter plotting in real time

Hello,

I am acquiring data from a sensor and am trying to scatter plot it in real time. My code goes like this:

f=figure
while datenum(clock)<endTime
    message=judp('RECEIVE',40001,264);
.
. %parse message
.

Now I have an array 'a' with the data needed to plot.

for i=1:sizeof(a)
  f=scatter3(a(i,1),a(i,2),a(i,3),'*')
  hold on
end

The array 'a' keeps growing in size and my current code always creates a new figure window for each update of the plot. So, I end up with 20 graph windows rather than 1 continuously updating graph.

Is it possible to update the graph in real time as the data keeps coming in? I also don't want multiple figure windows opening up.

Thanks for any help.

Pranav

Answer 1

[KSSV]

x = rand(10,1) ; y = rand(10,1) ;

h = scatter(x,y,'Or') ;

for i = 1:100
    x = rand(10,1) ;
    y = rand(10,1) ;
    set(h,'XData',x,'YData',y) ;
    drawnow
    pause(0.1)
end

[Pranav Thiagarajan]

Thank you! I also tried this for polar plots, but it doesnt seem to work. Do you know how I can do that?