PRETTYPLOT works just like PLOT, but avoids the line and markers being on top of each other. Instead, the line joins the markers without touching them.
x = -pi:pi/10:pi;
y = tan(sin(x)) - sin(tan(x));
h = prettyplot(x,y,'-+b',x,2*cos(x),'-xr','LineWidth',2,'MarkerSize',8);
h = [h;prettyplot(x,randn(size(x)),'-o','LineWidth',1,'MarkerSize',6,'color',[0,0.8,0])];
I was looking for an alternative to the Matlab function plot to solve this specific problem with lines on top of markers, so thank you! Funny that I found your function via Matlab Fileexchange when you have written the function "inhouse" =)