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    %% Plot a Least-Squares Line
%

% Copyright 2015 The MathWorks, Inc.


%%
% Generate three sets of sample data and plot on the same figure.
x = 1:10;
rng default;  % For reproducibility
figure;

y1 = x + randn(1,10);
scatter(x,y1,25,'b','*')
hold on

y2 = 2*x + randn(1,10);
plot(x,y2,'mo')

y3 = 3*x + randn(1,10);
plot(x,y3,'rx:')

%%
% Add a least-squares line for each set of sample data.
lsline