回复 第1楼 的 reader0527：blogspot上的例子：
<br />
xlab.name = expression(paste(italic(vti), Delta, sep=""))<br />
ylab.name = expression(mu * "ml")<br />
main.name = expression(paste(plain(sin) * phi))<br />
plot(0, 0, xlab=xlab.name, ylab=ylab.name, main=main.name, xlim=c(-pi, pi), ylim=c(-1.5, 1.5), axes=FALSE)<br />
axis(1, at = c(-pi, -pi/2, 0, pi/2, pi), labels = expression(-pi, -pi/2, 0, pi/2, pi))<br />
axis(2)<br />
box()<br />
text(-pi/2, 0, expression(hat(alpha) == (X^t * X)^{-1} * X^t * y))<br />
text(pi/2, 0, expression(paste(frac(1, sigma*sqrt(2*pi)), plain(e)^{frac(-(x-mu)^2, 2*sigma^2)}, sep="")), cex = 1.2)<br />
</p>
