%% Compare Data Sets Using Overlayed Area Graphs
% This example shows how to compare two data sets by overlaying their area
% graphs.
%
%% Overlay Two Area Graphs
% Create the sales and expenses data from the years 2004 to 2008.

% Copyright 2015 The MathWorks, Inc.

years = 2004:2008;
sales = [51.6 82.4 90.8 59.1 47.0];
expenses = [19.3 34.2 61.4 50.5 29.4];

%%
% Display sales and expenses as two separate area graphs in the same axes.
% First, plot an area graph of |sales|. Change the color of the area graph
% by setting the |FaceColor| and |EdgeColor| properties using RGB triplet
% color values.
area(years,sales,'FaceColor',[0.5 0.9 0.6],'EdgeColor',[0 0.5 0.1])
             
%% 
% Use the |hold| command to prevent a new graph from replacing the existing
% graph. Plot a second area graph of |expenses|. Then, set
% the |hold| state back to |off|.
hold on
area(years,expenses,'FaceColor',[0.7 0.7 0.7],'EdgeColor','k')
hold off
%% Add Grid Lines
% Set the tick marks along the _x_-axis to correspond to whole years. Draw
% a grid line for each tick mark. Display the grid lines on top of the area
% graphs by setting the |Layer| property. Starting in R2014b, you
% can use dot notation to set properties. If you are using an earlier
% release, use the <docid:matlab_ref.f67-432995> function instead.

ax = gca; % current axes
ax.XTick = years;
ax.XGrid = 'on';
ax.Layer = 'top';
    
%% Add Title, Axis Labels, and Legend
% Give the graph a title and add axis labels. Add a legend to the graph to
% indicate the areas of profits and expenses.
title('Profit Margin for 2004 to 2008')
xlabel('Years')
ylabel('Expenses + Profits = Sales in 1000s')
legend('Profits','Expenses')
