This assumes you've gotten matlab started and are staring at a matlab prompt. You can copy and paste text into the matlab window. Do that with each block of statements, one block at a time, so you can see the results of each plot.
%% make a row vector from -3 to 3 %% you can see the contents of xvals by typing 'xvals' with no trailing ';' xvals = -3:.25:3; %% make a row vector of gaussian densities. yvals = 1/(sqrt(2*pi))*exp(-(xvals.^2)/2); %%%% The FOR loop below produces the same result as the statement above %% for i = 1:length(xvals); %% yvals(i) = 1/(sqrt(2*pi))*exp(-(xvals(i)^2)/2); %% end; %% make a simple 2D plot plot(xvals, yvals); %% dress it up a little clf; h = axes('position',[.2 .1 .6 .8]); %% also try "help subplot" set(h,'fontsize', 7); %% type "set(h)" to get huge list of options %% plot(xvals, yvals), axis([-3.1 3.1 0 .5]), grid on; xlabel('Standard Deviations'), ylabel('Probablility Density'), legend('The curve'), text(-.4, .42, 'The peak'); title('Your Basic Gaussian Density') %% make another row vector zvals = log10(abs(yvals))/2; %% simple 2-color plot plot(xvals, yvals, ':', xvals, zvals, '--'); legend('The curve', 'Its log'); %% Clear, then put three plots on the same graph clf; plot(xvals, yvals,'-'), hold on, plot(xvals, zvals,'o'), hold on, plot(xvals, xvals/7,'+'), hold off; %% save it in a file in postscript format print -deps killmeplot.ps %% example from 'help quiver' xord = -2:.2:2; yord = -2:.2:2; [x,y] = meshgrid(xord,yord); z = x .* exp(-x.^2 - y.^2); [px,py] = gradient(z,.2,.2); contour(x,y,z),hold on, quiver(x,y,px,py), hold off %% one kind of 3D plot plot3(x,y,z), grid on; % spin it with the mouse rotate3d on; %% another kind of 3D plot mesh(xord, yord, z), view(10,20); rotate3d on;