Sample colors

Plot samples in different colors

Multiple colors: set color order

define in the beginning the color-order for all plots

set(0,'DefaultAxesColorOrder',[1 0 0;0 1 0;0 0 1])

or, for an individual plot

h = plot(...)

set(h,'DefaultAxesColorOrder',[1 0 0;0 1 0;0 0 1])

plot selected samples in different color

X = randn(2,100); % data set X

idx = 1:10; % select first 10 samples to highlight in red

h1 = plot(X(1,:),X(2,:),'.','Color',[0.7,0.7,0.7]); hold on % plot all samples in grey

h2 = plot(X(1,idx),X(2,idx),'.','Color','red'); hold off % plot selected samples (idx) in red

http://www.mathworks.com/help/matlab/creating_plots/change-default-line-style-and-color-orders.html