%%% plots.m: to run this script, at the matlab prompt type
%%% plots
%%% 
%%% contains some examples of simple plots, multiple plots
%%% 
%%% requires data file sine.dat

echo on

% clear text window, clear/reset graphics window 
clc
clf reset


%%%%%%%%%%%%%%%%%% simple plot %%%%%%%%%%%%%%%%%%%
% read in the data file sine.dat; stored in array sine(*,*)
load sine.dat;

% plot the first column of the array sine (x values) against the
% second column of the array sine (sin(x) values)
plot(sine(:,1), sine(:,2)), xlabel('x-axis'), ylabel('y-axis'),
	title('Simple Sine Curve');

%Press any key to continue
pause

clf reset

%%%%%%%%%%%% multiple plots, different colors & plot symbols %%%%%%%%%%%%%

% define array x, and the arrays y* as below
x = -5.0:0.2:5.0;
y1 = sin(x);
y2 = exp(x);
y3 = atan(x);
y4 = cosh(x);

% plot 4 graphs on one page, with varying symbols and colors
subplot(2,2,1), plot(x,y1,'m*'), title('Sin(x)');
subplot(2,2,2), plot(x,y2,'bo'), title('Exp(x)');
subplot(2,2,3), plot(x,y3,'g-.'), title('Arctan(x)');
subplot(2,2,4), plot(x,y4,'r'), title('Cosh(x)');

%Press any key to continue
pause

%%%%%%%%%%%%%%%% logarithmic plots %%%%%%%%%%%%%%%%%%%%

% multiple plots again, with log & semi-log axes, grid in background
subplot(2,2,1), plot(x,y2), title('Exp(x)'), grid;
subplot(2,2,2), loglog(x,y2), title('log(Exp(x)) vs log(x)'), grid;
subplot(2,2,3), semilogx(x,y2), title('Exp(x) vs log(x)'), grid;
subplot(2,2,4), semilogy(x,y2), title('log(Exp(x) vs x'), grid;


echo off