% Example m-file to plot daily high and low temperature in Shenandoah, IA
% Brian Hornbuckle, January 15, 2008

clear all;

load shen_1972_data.dat;    % first column is day of June, 1972
                            % second column is high temperature
                            % third column is low temperature

d = shen_1972_data(:,1);    % assign the first column of shen_1972_data to d
h = shen_1972_data(:,2);    % assign the second column of shen_1972_data to h
l = shen_1972_data(:,3);    % assign the third column to l
                            % making these assignments makes it easier to
                            % write the program

figure(1)

plot(d,h,'ro-',d,l,'bx-');  % plot high temp versus day, and low temp versus day
grid on;                    % display a grid on the figure
xlabel('day of June, 1972');    % label the x-axis
ylabel('temperature, \circF');  % label the y-axis
title('Shenandoah, IA');        % make a title
legend('high temperature','low temperature',2);     % make a legend
axis([1,15,50,100]);        % change the limits of the x- and y- axes
                            % to make the figure look better