Dear Sara,

Even though the "scatter" does not support error bars, you can overlay the results of "errorbar" on top of "scatter". I am providing the following example:

x = [1,2,3]; y = x.^2;

scatter(x,y);

axis([0,4,0,10]);

hold on;

err = ones(size(x));

errorbar(x, y, err, 'LineStyle','none');