%   File:  multicolPlot
%
%   MATLAB script to demonstrate the use of readColData.m for reading
%   column data with text headings.  Read the data in plot it using
%   a legend derived from the labels in the data file

%  read labels and x-y data
[labels,month,t] = readColData('PDXtemperature.dat',4,5);

plot(month,t(:,1),'ro',month,t(:,2),'c+',month,t(:,3),'g-');

xlabel(labels(1,:));                      % add axis labels and plot title
ylabel('temperature (degrees F)');
title('Monthly average temperature for Portland International Airport');

%  
legend(labels(2,:),labels(3,:),labels(4,:));