Here's an alternative way:
% for clarity change x -> data
data=[0 0 0 0 0 0 -0.0488497231243238 0.179582426641752 ...
0.417286015074303 0.26880559803247 -0.334079911686008];
% for clarity change y -> labels
labels=[1 1 1 1 1 1 2 2 2 2 2];
% define values for y-axis
y=zeros(length(data),1);
% create plot
gscatter(data, y, labels, 'br', '.',18);
axis([min(data)-.1 max(data)+.1 -.05 .1])
yticks(0)
title('1-D Plot by Class','FontSize',18)
Here is what this looks like:
