%表現Max-Log-MAP實現的近似程度
clear
clc
x1=1;
x2=-10:0.1:10;
y1=log(exp(x1)+exp(x2));
y2=max(x1,x2);
plot(x2,y1,'-.',x2,y2)
text(-9,10,'固定x1=1，而x2=-10:0.1:10')
xlabel('y2')
legend('log(exp(x1)+exp(x2))','max(x1,x2)')
title('Max-Log-MAP的數學')