% Plot example with text annotation
% from GNU Octave Manual ver. 3
% http://www.network-theory.co.uk/docs/octave3/octave_172.html
% visited 13NOV2009

x = 0:0.01:3;
plot(x,erf(x));
hold on;
plot(x,x,"r");
axis([0, 3, 0, 1]);
text(0.65, 0.6175, strcat('\leftarrow x = {2/\surd\pi',
' {\fontsize{16}\int_{\fontsize{8}0}^{\fontsize{8}x}}',
' e^{-t^2} dt} = 0.6175'))