text function

Hello,

I am trying to annotate a figure in Compose, which requires special characters. Please see the sample code below. Are these special characters available in Compose?

clear all;
close all;
clc;
x=linspace(0,2*pi,200);
y=sin(x);
plot(x,y);
text(pi,1,[num2str(15),'^{0}']);
text(pi,-1,['\oslash',num2str(25)]);

Thank you

Berker