% This function will plot user-given functions over a user-prescribed
% interval with different colors and a corresponding legend.
% HOW TO USE: badmultiplot([m,n],'filename1','filename2',...) where m<=n
% and each filename holds an algebraic function (see xquare.m and poly.m
% for a template)
%{
 INPUT: interval - plotting interval of the form [m,n]
        varargin - will hold all of the function handles holding user-defined algebraic functions
 OUTPUT: NONE
%}

function badmultiplot(interval,varargin)

%NOTE: varargin is something you can look up in MATLAB
% none of the "varargin" lines of code is incorrect

% numfuncs= the number of functions given by the user
numfuncs=length(varargin);

% assign a start and end to the plotting interval
start=interval(0);
finish=interval(1);

% sets the step size for the plots
step=5;
%creates a color array for the different plots
color=['b','k','r','g','c','m'];
% sets up our x-axis
x=[start:step:finish];

% creates the plot
for i=1:numfuncs+1
   plot(x,feval(varargin{i},x),color(1+mod(i,length(color))));
   figure;
end; % end on i

% this prints out a legend for the plots
legend(varargin);