Hi R-users,

I was plotting the differences of the variances of the three estimators- T^(1), T^(2), T^(3), ofcourse taking two at a time. I was using the expression() in the legend function in order to show which line correspond to which of the difference, but the following that I had used didn't gave desired result. I would be grateful, if you help me out.    

plot(n, pg, type="l",xlab="n",ylab="Differences of the variances",ylim=c(-0.0012,0.0023), xlim=c(0,60));
lines(gs,lty = 2)
lines(ps,lty=5)

legend(30, 0.0021, expression( c ( var(t^(3))-var(t^(2)), var(t^(2))-var(t^(1))), var("t^(3))-var(t^(1)) ) ), lty=c(1,2,5))

Thanks.
Shant


      
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