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    %% Load and Plot Data from Text File
% This example uses sample data in |count.dat|, a space-delimited
% text file. The file consists of three sets of hourly traffic counts,
% recorded at three different town intersections over a 24-hour period.
% Each data column in the file represents data for one intersection.

% Copyright 2015 The MathWorks, Inc.


%% Load the count.dat Data
% Import data into the workspace using the |load| function.
load count.dat

%%
% Loading this data creates a 24-by-3 matrix called |count| in the MATLAB
% workspace.

%%
% Get the size of the data matrix.
[n,p] = size(count)

%%
% |n| represents the number of rows, and |p| represents the number of columns.

%% Plot the count.dat Data
% Create a time vector, |t|, containing integers from |1| to |n|.
t = 1:n;

%%
% Plot the data as a function of time, and annotate the plot.
plot(t,count), 
legend('Location 1','Location 2','Location 3','Location','NorthWest')
xlabel('Time'), ylabel('Vehicle Count')
title('Traffic Counts at Three Intersections')