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    %% Placing Markers at Every Tenth Data Point
% This example shows how to use fewer data points to plot the markers than
% you use to plot the lines. This example plots the data twice using a
% different number of points for the dotted line and marker plots.

x1 = 0:pi/100:2*pi;
x2 = 0:pi/10:2*pi;
plot(x1,sin(x1),'r:',x2,sin(x2),'r+')